4085:
58:
36:
47:
741:
516:
1488:
4727:
355:
1447:
4079:
2888:
5186:
3860:
1211:
2902:
3870:
2876:
1181:
1392:
sunlight in such a way that some of it reaches the ground even when the Sun is below the horizon by about 34 minutes of arc. So the first light reaches the ground when the centre of the Sun is still below the horizon by about 50 minutes of arc. Thus, daytime is on average around 7 minutes longer than
382:
around the Sun while the Earth spins on an inclined axis, this period can be up to 7.9 seconds more than (or less than) 24 hours. In recent decades, the average length of a solar day on Earth has been about 86,400.002 seconds (24.000 000 6 hours). There are currently about 365.2421875 solar days in
1685:
A Cautionary Note: Because the rotation period of the Earth is almost the same as the length of its day, we sometimes get a bit sloppy in discussing the rotation of the sky, and say that the stars rotate around us once each day. In a similar way, it is not unusual for careless people to mix up the
432:
In terms of Earth's rotation, the average day length is about 360.9856°. A day lasts for more than 360° of rotation because of the Earth's revolution around the Sun. With a full year being slightly more than 360 days, the Earth's daily orbit around the Sun is slightly less than 1°, so the day is
1052:, due to some biological systems being affected by the tide. The length of a day at the Earth's formation is estimated at 6 hours. Arbab I. Arbab plotted day lengths over time and found a curved line. Arbab attributed this to the change of water volume present affecting Earth's rotation.
276:
day, and so while almost all days have a duration of 86,400 seconds, there are these exceptional cases of a day with 86,401 seconds (in the half-century spanning 1972 through 2022, there have been a total of 27 leap seconds that have been inserted, so roughly once every other year).
390:
Ancient custom has a new day starting at either the rising or setting of the Sun on the local horizon (Italian reckoning, for example, being 24 hours from sunset, old style). The exact moment of, and the interval between, two sunrises or sunsets depends on the geographical position
542:. A sidereal day is about 4 minutes less than a solar day of 24 hours (23 hours 56 minutes and 4.09 seconds), or 0.99726968 of a solar day of 24 hours. There are about 366.2422 stellar days in one mean tropical year (one stellar day more than the number of solar days).
1380:
directly reaches the ground, assuming that there are no obstacles. The length of daytime averages slightly more than half of the 24-hour day. Two effects make daytime on average longer than night. The Sun is not a point but has an apparent size of about 32
422:(lower culmination). The exact moment is dependent on the geographical longitude, and to a lesser extent on the time of the year. The length of such a day is nearly constant (24 hours ± 30 seconds). This is the time as indicated by modern sundials.
1358:
Humans have divided the day in rough periods, which can have cultural implications, and other effects on humans' biological processes. The parts of the day do not have set times; they can vary by lifestyle or hours of daylight in a given place.
466:
with regularly occurring schedules came into use, with most major countries having adopted them by 1929. As of 2015, throughout the world, 40 such zones are now in use: the central zone, from which all others are defined as offsets, is known as
1278:
1:5 defines a day in terms of "evening" and "morning" before recounting the creation of the Sun to illuminate it: "And God called the light Day, and the darkness he called Night. And the evening and the morning were the first day." The
374:, the time it takes for the Sun to return to its culmination point (its highest point in the sky). Due to an orbit's eccentricity, the Sun resides in one of the orbit's foci instead of the middle. Consequently, due to
429:; the speed is the same as the average speed of the real Sun, but this removes the variation over a year as the Earth moves along its orbit around the Sun (due to both its velocity and its axial tilt).
796:
make a month. Various decimal time proposals which do not redefine the day: Henri de
Sarrauton's proposal kept days, and subdivided hours into 100 minutes; in Mendizábal y Tamborel's proposal, the
1267:
animals, the day naturally begins at dawn and ends at sunset. Humans, with their cultural norms and scientific knowledge, have employed several different conceptions of the day's boundaries.
378:, the planet travels at different speeds at various positions in its orbit, and thus a solar day is not the same length of time throughout the orbital year. Because the Earth moves along an
268:
is practiced, and each year there will be one 23-hour civil day and one 25-hour civil day. Due to slight variations in the rotation of the Earth, there are rare times when a
2037:
2397:
3983:
1484:. Civil twilight is when the sun is up to 6 degrees below the horizon; nautical when it is up to 12 degrees below, and astronomical when it is up to 18 degrees below.
1033:
3906:
1851:
2353:
1028:
seconds in duration, a civil day can be either 86,401 or 86,399 SI seconds long on such a day. Other than the two-millisecond variation from tidal deceleration,
366:
Several definitions of this universal human concept are used according to context, need, and convenience. Besides the day of 24 hours (86,400 seconds), the word
2324:
379:
760:
as a base unit. Metric time uses metric prefixes to keep time. It uses the day as the base unit, and smaller units being fractions of a day: a metric hour (
2704:
1915:
834:
The full day covering both the dark and light periods, beginning from the start of the dark period or from a point near the middle of the dark period
2274:
1005:
is slowing. Because of the way the second is defined, the mean length of a solar day is now about 86,400.002 seconds, and is increasing by about 2
788:
of a day; etc. Similarly, in decimal time, the length of a day is static to normal time. A day is also split into 10 hours, and 10 days comprise a
456:
For civil purposes, a common clock time is typically defined for an entire region based on the local mean solar time at a central meridian. Such
1881:
1326:
and in modern times is for the civil day to begin at midnight, i.e. 00:00, and to last a full 24 hours until 24:00, i.e. 00:00 of the next day.
2194:
3899:
1937:
696:
2654:
2094:
1999:
5161:
1941:
1756:
2738:
1786:
375:
2123:
4675:
4437:
1609:
2497:
3892:
3469:
3305:
2468:
2029:
2767:
2615:
2389:
2934:
2527:
2346:
1711:
1673:
1592:
493:
A day is commonly divided into 24 hours, with each hour being made up of 60 minutes, and each minute composed of 60 seconds.
2603:
The close of day, esp. the time from about 6 p.m., or sunset if earlier, to bedtime; the period between afternoon and night.
4406:
2675:
1537:
2242:
5215:
1841:
370:
is used for several different spans of time based on the rotation of the Earth around its axis. An important one is the
4877:
1807:
4157:
2552:
1750:
1250:
538:
with respect to the celestial background or a distant star (assumed to be fixed). Measuring a day as such is used in
2847:
1646:
5067:
1491:
937:– 6:00 pm) or 21:00 (9:00 pm) or another fixed clock period overlapping or offset from other time periods such as "
688:
1970:
3419:
3074:
2679:
217:, a day begins at noon so that observations throughout a single night are recorded as happening on the same day.
2304:
5171:
4230:
3298:
1232:
1032:, which creates an irregularity in the placement of leap seconds. Leap seconds are announced in advance by the
359:
57:
4886:
4411:
2368:
1299:
and thus times during the evening need to be shifted back one calendar day in modern reckoning. Days such as
684:
678:
221:
46:
35:
2711:
691:. A day, with symbol d, is defined using SI units as 86,400 seconds; the second is the base unit of time in
4668:
3381:
2573:
1904:
294:
4366:
4346:
4292:
4177:
4013:
3672:
740:
515:
2266:
4033:
4018:
3956:
3935:
3024:
3004:
1021:
472:
273:
2892:
1706:
1641:
1048:, the day lengths of geological periods have been estimated by measuring sedimentation rings in coral
4814:
4187:
3998:
3735:
3584:
3464:
3014:
2927:
1873:
502:
2906:
970:
A specific period of the day, which may vary by context, such as "the school day" or "the work day".
800:
was the basic unit, with subdivisions made upon it; and Rey-Pailhade's proposal divided the day 100
5125:
3434:
1563:
2150:
1016:
second fell out of sync with a second derived from the rotational period. This arose the need for
5166:
4661:
4447:
4225:
4127:
4043:
4038:
3690:
3341:
1353:
1221:
1029:
241:
1487:
5220:
4870:
3044:
2644:
2066:
2007:
1949:
1736:
4600:
3873:
3505:
3450:
3404:
3389:
3034:
1481:
1386:
1284:
425:
A further improvement defines a fictitious mean Sun that moves with constant speed along the
2728:
1778:
4427:
4341:
4167:
4028:
3756:
3725:
3174:
3069:
2920:
2880:
2733:
2316:
2162:
1742:
1228:
611:
520:
407:
265:
24:
2115:
8:
5151:
4637:
4432:
4287:
4152:
4104:
3630:
3089:
3049:
1732:
1292:
1197:
1036:, which measures the Earth's rotation and determines whether a leap second is necessary.
998:
831:
A day counting approximation, for example "See you in three days." or "the following day"
704:
445:
88:
3973:
2320:
2166:
1605:
1432:. Evening begins around 5 or 6 pm, or when the sun sets, and ends when one goes to bed.
4819:
4612:
4386:
4310:
4240:
3579:
3557:
3424:
3248:
3219:
3154:
3147:
2824:
2789:
2649:
2489:
2186:
2174:
1464:
in which there is natural light but no direct sunlight. The morning twilight begins at
990:
984:
318:
302:
220:
In specific applications, the definition of a day is slightly modified, such as in the
158:
organizes dates based on the Sun's annual cycle, giving consistent start dates for the
5189:
5075:
4863:
4460:
4325:
4142:
3660:
3539:
3439:
3292:
3195:
3099:
2829:
2811:
2548:
2523:
2460:
2190:
2178:
2086:
2082:
2006:(8 ed.). Bureau International des Poids et Mesures (BIPM). 2014 . Archived from
1942:"Non-SI units accepted for use with the SI, and units based on fundamental constants"
1746:
1666:
Certain authors caution against identifying "day" with rotation period. For example:
1588:
1477:
1425:
1420:, or between noon and the start of evening. This period of time sees human's highest
700:
426:
67:
1312:
4726:
4605:
4351:
4330:
4282:
4245:
4058:
3778:
3766:
3594:
3562:
3394:
3263:
3179:
3169:
3084:
2819:
2801:
2759:
2170:
2078:
1818:
1421:
1192:
1180:
711:
563:
326:
253:
124:
1701:
1669:
722:". This makes the SI-based day last exactly 794,243,384,928,000 of those periods.
4942:
4336:
4315:
4147:
4119:
3884:
3840:
3705:
3682:
3650:
3602:
3589:
3552:
3534:
3164:
3159:
2357:
1524:
1275:
1002:
549:, other bodies in the Solar System have day times, the durations of these being:
510:
322:
310:
237:
202:
84:
2683:
1585:
The Oxford
Introduction to Proto-Indo-European and the Proto-Indo-European World
1527:
during night can impact human and animal life, for example by disrupting sleep.
486:
of the Sun on the central meridian of the time zone. Such a day may be called a
354:
5095:
5027:
4844:
4632:
4391:
4381:
4320:
4277:
4109:
4099:
4068:
3968:
3940:
3783:
3773:
3572:
3444:
3414:
3399:
3184:
3142:
3137:
3009:
2806:
2227:
1473:
463:
334:
330:
233:
163:
155:
1446:
5204:
5156:
5080:
5017:
5007:
4809:
4792:
4786:
4519:
4470:
4455:
4401:
4172:
4008:
4003:
3919:
3863:
3813:
3761:
3695:
3667:
3655:
3645:
3635:
3517:
3361:
3287:
3236:
3189:
3104:
3064:
3059:
3054:
2987:
2815:
2182:
2090:
1468:
and ends at sunrise, while the evening twilight begins at sunset and ends at
1382:
1330:
1323:
1308:
1300:
1129:
1045:
934:
878:
862:
is also often used. Other languages also have a separate word for a full day.
527:
506:
384:
249:
198:
190:
186:
139:
2587:
5210:
5100:
5057:
5042:
4997:
4977:
4894:
4834:
4617:
4504:
4499:
4494:
4481:
4220:
3835:
3829:
3495:
3429:
3351:
3282:
3231:
3132:
3079:
3019:
2833:
1429:
1319:
1295:
reckoning: In this system, a reference like "two hours into the day" meant
1271:
870:
839:
825:
797:
757:
749:
731:
707:
699:(BIPM) redefined a second as "the duration of 9,192,631,770 periods of the
487:
437:
1779:"Operations Handbook – Ozone Observations with a Dobson Spectrophotometer"
756:
proposals have been made, but do not redefine the day, and use the day or
468:
4972:
4927:
4839:
4627:
4622:
4267:
4250:
4182:
4162:
4048:
3930:
3845:
3823:
3730:
3715:
3510:
3490:
3480:
3409:
3366:
3346:
3275:
3094:
2996:
2149:
McCarthy, Dennis D.; Hackman, Christine; Nelson, Robert A. (2008-11-01).
1636:
1558:
1288:
1017:
1006:
980:
753:
735:
531:
483:
415:
286:
269:
245:
206:
171:
2887:
406:
A more constant day can be defined by the Sun passing through the local
4642:
4595:
4579:
4465:
4371:
4192:
4053:
4023:
3961:
3740:
3640:
3547:
3522:
3325:
3109:
2623:
1978:
1389:
1264:
1235: in this section. Unsourced material may be challenged and removed.
1097:
193:, respectively. Because the time of midnight varies between locations,
1686:
rotation period of a planet with the length of its day, or vice versa.
5037:
4952:
4829:
4763:
4711:
4539:
4376:
4260:
4235:
4215:
4132:
4084:
4078:
4063:
3803:
3720:
3356:
3268:
3243:
3224:
3114:
1910:
1846:
1401:
1304:
942:
890:
539:
457:
392:
257:
214:
194:
112:
1210:
4917:
4824:
4781:
4735:
4574:
4554:
4396:
4302:
4202:
3993:
3988:
3371:
3214:
3124:
2982:
2972:
1842:"Shaky rings help scientists measure Saturn's days – Speedy planet"
1547:
1512:
1453:
1441:
1377:
1161:
1145:
1113:
905:
901:
897:
692:
535:
479:
441:
419:
229:
178:
135:
1977:. Bureau International des Poids et Mesures (BIPM). Archived from
5105:
5090:
5032:
4962:
4957:
4907:
4748:
4716:
4701:
4693:
4653:
4569:
4559:
4489:
4361:
4272:
4137:
3710:
3700:
3622:
3613:
3598:
3485:
3330:
3253:
2962:
2901:
2298:
2235:
Department of
Physics, Faculty of Science, University of Khartoum
1542:
1457:
1409:
1405:
1397:
1373:
1368:
1280:
1034:
International Earth
Rotation and Reference Systems Service (IERS)
1012:
Since the rotation rate of the Earth is slowing, the length of a
994:
946:
938:
923:
919:
882:
715:
651:
621:
400:
261:
116:
104:
20:
3500:
2067:"Decimal Time: Misadventures of a Revolutionary Idea, 1793–2008"
1555:, for a discussion of daylight and darkness at various latitudes
744:
Decimal clock face, made in around the start of the 19th century
5120:
5022:
4932:
4912:
4902:
4753:
4564:
4514:
4509:
3808:
2967:
2875:
2788:
Blume, Christine; Garbazza, Corrado; Spitschan, Manuel (2019).
1552:
1461:
1417:
1049:
927:
641:
631:
225:
210:
159:
100:
1608:. International Earth Rotation and Reference Systems Service.
534:
is the span of time it takes for the Earth to make one entire
462:
began to be adopted about the middle of the 19th century when
5135:
5130:
5115:
4992:
4987:
4982:
4967:
4922:
4773:
4544:
4356:
4255:
4210:
3818:
3567:
3258:
3206:
2790:"Effects of light on human circadian rhythms, sleep and mood"
1508:
1503:
845:
811:
The word refers to various similarly defined ideas, such as:
661:
579:
546:
182:
147:
120:
1283:
day begins at either sunset or nightfall (when three second-
695:. In 1967–68, during the 13th CGPM (Resolution 1), the
5110:
5052:
5047:
4855:
4758:
4743:
4706:
4549:
4534:
4524:
3978:
3915:
2957:
2943:
2270:
1813:
1520:
1516:
1469:
1465:
1413:
1188:
957:
953:
821:
719:
601:
591:
411:
396:
167:
151:
143:
128:
108:
96:
81:
3984:
International Earth
Rotation and Reference Systems Service
5012:
5002:
2522:(2nd ed.). Taylor & Francis Group. p. 556.
1184:
201:. Other conventions are sometimes used, for example the
92:
2676:"Definitions from the US Astronomical Applications Dept"
2912:
672:
2787:
2570:
103:). As a day passes at a given location it experiences
2148:
1025:
1013:
689:
not an official unit, but is accepted for use with SI
2390:"Parts of the Day: Early morning, late morning, etc"
918:
The period of light when the Sun is above the local
395:
and latitude, as well as altitude), and the time of
19:
For the part of the day when there is daylight, see
2228:"The Length of the Day: A Cosmological Perspective"
2004:
478:The most common convention starts the civil day at
3914:
2450:÷ 360° × 2(for sunrise and set) × 24 hours ≈ 7 min
134:A collection of sequential days is organized into
1905:"Dwarf Planets of Our Solar System (Infographic)"
837:A full dark and light period, sometimes called a
5202:
2848:"Light pollution harms wildlife and ecosystems"
1587:. Oxford, UK: Oxford University Press. p. 124.
1472:. Both periods of twilight can be divided into
1333:the day was reckoned from sunrise to sunrise.
1291:Europe also followed this tradition, known as
1030:other factors minutely affect the day's length
896:Time regularly spend at paid work on a single
349:
197:are set up to facilitate the use of a uniform
4871:
4669:
3900:
2928:
1583:Mallory, James P.; Adams, Douglas Q. (2006).
725:
1833:
1336:Prior to 1926, Turkey had two time systems:
703:corresponding to the transition between two
697:International Bureau of Weights and Measures
5162:Historical definitions of the SI base units
127:in many organisms, which are vital to many
4878:
4864:
4676:
4662:
3907:
3893:
2935:
2921:
2608:
1902:
444:, a day is a full rotation of other large
242:Earth's natural fluctuation of a solar day
205:counts days from sunset to sunset, so the
2823:
2805:
2517:
1251:Learn how and when to remove this message
1039:
16:Time of one rotation around a planet axis
4438:International Commission on Stratigraphy
1731:
1486:
1445:
1179:
739:
514:
353:
2151:"The Physical Basis of the Leap Second"
1975:Resolution 1 of the 13th CGPM (1967/68)
1725:
1523:when no light from the sun is visible.
1311:are remnants of the older pattern when
974:
933:The time period from 06:00–18:00 (6:00
399:(as indicated by ancient hemispherical
5203:
2542:
2027:
1930:
1874:"planets/dwarf-planets/ceres/in-depth"
1839:
1776:
1340:, counting the hours from sunset, and
4859:
4657:
3888:
2916:
2327:from the original on 21 December 2019
2294:
2292:
2225:
2221:
2219:
2217:
2215:
2213:
2211:
2144:
2142:
2140:
2060:
2058:
2056:
2054:
1840:Griggs, Mary Beth (18 January 2019).
1307:(“All Hallows’ Eve”), and the Eve of
865:Part of a date: the day of the year (
433:slightly less than 361° of rotation.
3869:
2668:
2277:from the original on August 29, 2016
2064:
1936:
1854:from the original on 19 January 2019
1696:
1694:
1667:
1612:from the original on April 26, 2015.
1538:Determination of the day of the week
1416:. Afternoon occurs between noon and
1376:is the part of the day during which
1344:, counting the hours from midnight.
1233:adding citations to reliable sources
1204:
806:
673:In the International System of Units
260:. In most countries outside of the
2580:
2567:
503:Earth's rotation § Stellar day
13:
4683:
2616:"Definition of evening in English"
2289:
2208:
2137:
2051:
1777:Komhyr, Walter Dmyro (June 1980).
1511:is the period in which the sky is
1020:, which insert extra seconds into
952:The time period from first-light "
272:will get inserted at the end of a
14:
5232:
4158:Discrete time and continuous time
2868:
1884:from the original on June 2, 2021
1691:
1577:
177:In common usage, a day starts at
5185:
5184:
4725:
4083:
4077:
3868:
3859:
3858:
2900:
2886:
2874:
2226:Arbab, Arbab I. (January 2009).
2083:10.1163/156771509X12638154745382
2030:"Why don't we have metric time?"
1918:from the original on 18 May 2021
1738:Allen's Astrophysical Quantities
1670:"Rotation Period and Day Length"
1396:Daytime is further divided into
1318:The common convention among the
1315:began during the prior evening.
1209:
1022:Coordinated Universal Time (UTC)
850:; or more colloquially the term
473:Coordinated Universal Time (UTC)
56:
45:
34:
2840:
2781:
2770:from the original on 2022-08-22
2752:
2741:from the original on 2022-04-01
2721:
2705:"Glossary of Marine Navigation"
2697:
2657:from the original on 2021-05-01
2637:
2561:
2536:
2511:
2500:from the original on 2022-08-22
2482:
2471:from the original on 2022-08-22
2453:
2429:
2411:
2400:from the original on 2022-08-22
2382:
2362:
2339:
2259:
2248:from the original on 2022-08-20
2197:from the original on 2022-05-31
2126:from the original on 2017-02-02
2108:
2097:from the original on 2022-08-21
2040:from the original on 2022-08-21
2021:
1992:
1963:
1903:Tate, Karl (21 November 2012).
1896:
1866:
1808:"Planetary Fact Sheet – Metric"
1789:from the original on 2021-06-12
1759:from the original on 2011-12-09
1714:from the original on 2022-09-26
1676:from the original on 2018-09-29
1649:from the original on 2022-07-10
1220:needs additional citations for
922:(that is, the time period from
843:in English, from the Greek for
496:
482:: this is near the time of the
5172:System of units of measurement
4231:History of timekeeping devices
2028:Veitch, Harriet (2008-04-02).
1948:(8th ed.). Archived from
1800:
1770:
1660:
1629:
1616:
1606:"Earth Orientation Parameters"
1598:
360:Deep Space Climate Observatory
344:
1:
2891:The dictionary definition of
1735:& Cox, Arthur N. (2000).
1570:
1175:
1044:Discovered by paleontologist
685:International System of Units
679:International System of Units
519:Rotation of the dwarf planet
297:), with its cognates such as
166:organizes dates based on the
4885:
2574:National Academy of Sciences
2175:10.1088/0004-6256/136/5/1906
2116:"Definition of NYCHTHEMERON"
1024:. Although typically 86,400
792:the equivalent of a week. 3
451:
280:
7:
4178:Gravitational time dilation
4014:Barycentric Coordinate Time
3673:Geological history of Earth
2593:. Oxford English Dictionary
2518:Refinetti, Roberto (2006).
1530:
1435:
774:of a day; a metric minute (
358:Earth's rotation imaged by
350:Apparent and mean solar day
10:
5237:
5216:Orders of magnitude (time)
4034:Geocentric Coordinate Time
4019:Barycentric Dynamical Time
3957:Coordinated Universal Time
3025:Orders of magnitude (time)
2807:10.1007/s11818-019-00215-x
2547:. CRC Press. p. 588.
1971:"SI Unit of Time (Second)"
1501:
1439:
1366:
1362:
1351:
978:
729:
726:In decimal and metric time
676:
500:
448:with respect to its star.
123:. This daily cycle drives
95:. On average, this is 24
18:
5180:
5144:
5066:
4941:
4893:
4802:
4772:
4734:
4723:
4692:
4588:
4479:
4446:
4420:
4301:
4201:
4188:Time-translation symmetry
4118:
4092:
4075:
3999:International Atomic Time
3949:
3926:
3854:
3796:
3749:
3736:Time translation symmetry
3681:
3621:
3611:
3533:
3460:
3380:
3321:
3205:
3123:
3033:
2995:
2981:
2950:
2645:"Definition of 'evening'"
2490:"Definition of AFTERNOON"
2267:"IERS science background"
2034:The Sydney Morning Herald
1408:. Morning occurs between
545:Besides a stellar day on
410:, which happens at local
203:Jewish religious calendar
5126:minute and second of arc
2942:
2543:McCabe, Paul T. (2004).
2155:The Astronomical Journal
1564:World Meteorological day
1497:
1347:
1169:20 hours and 40 minutes
1153:21 hours and 20 minutes
1121:22 hours and 40 minutes
1105:23 hours and 20 minutes
285:The term comes from the
70:, from afternoon to dusk
5167:2019 revision of the SI
4448:Astronomical chronology
4421:Archaeology and geology
4128:Absolute space and time
4044:IERS Reference Meridian
4039:International Date Line
3950:International standards
3691:Absolute space and time
3342:Astronomical chronology
2764:www.merriam-webster.com
2545:Contemporary Ergonomics
2494:www.merriam-webster.com
2465:www.merriam-webster.com
2461:"Definition of MORNING"
2120:www.merriam-webster.com
2000:"Unit of Time (Second)"
1707:Encyclopædia Britannica
1642:Encyclopædia Britannica
1354:Category:Parts of a day
1069:Number of days per year
66:A quarter-day cycle at
3741:Time reversal symmetry
3045:Italian six-hour clock
2905:Quotations related to
2568:Ray, James T. (1960).
1494:
1450:
1297:two hours after sunset
1202:
1040:Geological day lengths
856:. In other languages,
745:
523:
440:or other parts of the
363:
333:– all stemming from a
181:, written as 00:00 or
23:. For other uses, see
4407:Weekday determination
4293:Sundial markup schema
3506:Time and fate deities
3451:The Unreality of Time
3390:A series and B series
2852:DarkSky International
2760:"Definition of NIGHT"
2394:Britannica Dictionary
2301:Bureau des Longitudes
2269:. Frankfurt am Main:
2065:Vera, Hector (2009).
1515:; the period between
1490:
1482:astronomical twilight
1456:is the period before
1449:
1183:
979:Further information:
743:
518:
357:
209:begins at sundown on
162:from year to year. A
142:, almost always into
89:rotation of the Earth
5068:Other accepted units
4428:Chronological dating
4168:Theory of relativity
4029:Daylight saving time
3757:Chronological dating
3726:Theory of relativity
3070:Daylight saving time
2883:at Wikimedia Commons
2734:Cambridge Dictionary
2520:Circadian Physiology
1812:nssdc.gsfc.nasa.gov
1733:Allen, Clabon Walter
1668:Seligman, Courtney.
1622:L. Holford-Stevens,
1428:, and a decrease of
1385:. Additionally, the
1229:improve this article
975:Variations in length
873:, day of the month (
446:astronomical objects
266:daylight saving time
224:day (exactly 86,400
91:with respect to the
25:Day (disambiguation)
5152:Conversion of units
4638:Time value of money
4433:Geologic time scale
4288:History of sundials
4153:Cosmological decade
4105:Greenwich Mean Time
3936:Orders of magnitude
3050:Thai six-hour clock
2349:Quaestiones Romanae
2321:1969LAstr..83..411K
2167:2008AJ....136.1906M
1624:The History of Time
1198:Nuremberg Chronicle
1158:−500 million years
1142:−400 million years
1126:−300 million years
1110:−200 million years
1094:−100 million years
1074:Duration of the day
376:Kepler's second law
362:, showing axis tilt
4945:with special names
4613:Mental chronometry
4241:Marine chronometer
4093:Obsolete standards
3580:Rosy retrospection
3558:Mental chronometry
3382:Philosophy of time
2650:Collins Dictionary
2356:2021-02-09 at the
2305:"Paléo-Astronomie"
1626:(Oxford 2005) p. 6
1495:
1451:
1426:traffic collisions
1203:
995:gravitational pull
991:tidal deceleration
985:Tidal acceleration
746:
558:Daylength (hours)
524:
364:
240:accounting of the
5198:
5197:
5076:astronomical unit
4853:
4852:
4651:
4650:
4461:Nuclear timescale
4143:Continuous signal
3882:
3881:
3792:
3791:
3767:Circadian rhythms
3585:Tense–aspect–mood
3440:Temporal finitism
3317:
3316:
3293:Grandfather clock
2879:Media related to
2529:978-0-8493-2233-4
1593:978-0-19-929668-2
1478:nautical twilight
1424:, an increase of
1261:
1260:
1253:
1173:
1172:
1064:Geological period
1003:rotational period
997:slowing down the
956:" to last-light "
807:Other definitions
670:
669:
484:lower culmination
436:Elsewhere in the
427:celestial equator
234:standards keeping
125:circadian rhythms
68:Midtown Manhattan
5228:
5188:
5187:
4880:
4873:
4866:
4857:
4856:
4729:
4678:
4671:
4664:
4655:
4654:
4352:Dominical letter
4283:Equation of time
4246:Marine sandglass
4087:
4081:
4059:Terrestrial Time
3916:Time measurement
3909:
3902:
3895:
3886:
3885:
3872:
3871:
3862:
3861:
3779:Glottochronology
3619:
3618:
3535:Human experience
3395:B-theory of time
2993:
2992:
2937:
2930:
2923:
2914:
2913:
2904:
2890:
2878:
2862:
2861:
2859:
2858:
2844:
2838:
2837:
2827:
2809:
2785:
2779:
2778:
2776:
2775:
2756:
2750:
2749:
2747:
2746:
2725:
2719:
2718:
2716:
2710:. Archived from
2709:
2701:
2695:
2694:
2692:
2691:
2682:. Archived from
2672:
2666:
2665:
2663:
2662:
2641:
2635:
2634:
2632:
2630:
2612:
2606:
2605:
2600:
2598:
2584:
2578:
2577:
2565:
2559:
2558:
2540:
2534:
2533:
2515:
2509:
2508:
2506:
2505:
2486:
2480:
2479:
2477:
2476:
2457:
2451:
2449:
2447:
2446:
2443:
2440:
2433:
2427:
2425:
2424:
2420:
2415:
2409:
2408:
2406:
2405:
2386:
2380:
2366:
2360:
2343:
2337:
2336:
2334:
2332:
2296:
2287:
2286:
2284:
2282:
2263:
2257:
2256:
2254:
2253:
2247:
2232:
2223:
2206:
2205:
2203:
2202:
2161:(5): 1906–1908.
2146:
2135:
2134:
2132:
2131:
2112:
2106:
2105:
2103:
2102:
2062:
2049:
2048:
2046:
2045:
2025:
2019:
2018:
2016:
2015:
1996:
1990:
1989:
1987:
1986:
1967:
1961:
1960:
1958:
1957:
1934:
1928:
1927:
1925:
1923:
1900:
1894:
1893:
1891:
1889:
1870:
1864:
1863:
1861:
1859:
1837:
1831:
1830:
1828:
1826:
1817:. Archived from
1804:
1798:
1797:
1795:
1794:
1774:
1768:
1767:
1765:
1764:
1729:
1723:
1722:
1720:
1719:
1698:
1689:
1688:
1682:
1681:
1664:
1658:
1657:
1655:
1654:
1633:
1627:
1620:
1614:
1613:
1602:
1596:
1581:
1422:body temperature
1256:
1249:
1245:
1242:
1236:
1213:
1205:
1193:Hartmann Schedel
1055:
1054:
1027:
1015:
999:Earth's rotation
861:
855:
787:
786:
782:
773:
772:
768:
586:
574:
572:
552:
551:
296:
254:celestial sphere
60:
49:
38:
5236:
5235:
5231:
5230:
5229:
5227:
5226:
5225:
5201:
5200:
5199:
5194:
5176:
5157:Metric prefixes
5140:
5062:
4944:
4937:
4889:
4884:
4854:
4849:
4798:
4768:
4730:
4721:
4688:
4682:
4652:
4647:
4584:
4475:
4442:
4416:
4297:
4197:
4148:Coordinate time
4120:Time in physics
4114:
4088:
4082:
4073:
3945:
3922:
3913:
3883:
3878:
3850:
3841:Time immemorial
3788:
3745:
3706:Coordinate time
3677:
3631:Geological time
3607:
3590:Time management
3553:Generation time
3537:
3529:
3474:
3456:
3376:
3335:
3313:
3201:
3119:
3036:
3029:
2985:
2977:
2946:
2941:
2871:
2866:
2865:
2856:
2854:
2846:
2845:
2841:
2786:
2782:
2773:
2771:
2758:
2757:
2753:
2744:
2742:
2727:
2726:
2722:
2714:
2707:
2703:
2702:
2698:
2689:
2687:
2674:
2673:
2669:
2660:
2658:
2643:
2642:
2638:
2628:
2626:
2614:
2613:
2609:
2596:
2594:
2586:
2585:
2581:
2566:
2562:
2555:
2541:
2537:
2530:
2516:
2512:
2503:
2501:
2488:
2487:
2483:
2474:
2472:
2459:
2458:
2454:
2444:
2441:
2438:
2437:
2435:
2434:
2430:
2422:
2418:
2417:
2416:
2412:
2403:
2401:
2388:
2387:
2383:
2367:
2363:
2358:Wayback Machine
2344:
2340:
2330:
2328:
2297:
2290:
2280:
2278:
2265:
2264:
2260:
2251:
2249:
2245:
2230:
2224:
2209:
2200:
2198:
2147:
2138:
2129:
2127:
2114:
2113:
2109:
2100:
2098:
2063:
2052:
2043:
2041:
2026:
2022:
2013:
2011:
1998:
1997:
1993:
1984:
1982:
1969:
1968:
1964:
1955:
1953:
1935:
1931:
1921:
1919:
1901:
1897:
1887:
1885:
1872:
1871:
1867:
1857:
1855:
1838:
1834:
1824:
1822:
1821:on 19 July 2012
1806:
1805:
1801:
1792:
1790:
1785:. p. 122.
1775:
1771:
1762:
1760:
1753:
1745:. p. 296.
1730:
1726:
1717:
1715:
1700:
1699:
1692:
1679:
1677:
1665:
1661:
1652:
1650:
1635:
1634:
1630:
1621:
1617:
1604:
1603:
1599:
1582:
1578:
1573:
1568:
1533:
1525:Light pollution
1506:
1500:
1444:
1438:
1371:
1365:
1356:
1350:
1324:ancient Chinese
1287:stars appear).
1257:
1246:
1240:
1237:
1226:
1214:
1178:
1042:
987:
977:
883:day of the week
857:
851:
809:
784:
780:
779:
770:
766:
765:
738:
730:Main articles:
728:
681:
675:
584:
570:
568:
513:
511:Rotation period
501:Main articles:
499:
454:
380:eccentric orbit
352:
347:
283:
238:local mean time
74:
73:
72:
71:
63:
62:
61:
52:
51:
50:
41:
40:
39:
28:
17:
12:
11:
5:
5234:
5224:
5223:
5218:
5213:
5196:
5195:
5193:
5192:
5181:
5178:
5177:
5175:
5174:
5169:
5164:
5159:
5154:
5148:
5146:
5142:
5141:
5139:
5138:
5133:
5128:
5123:
5118:
5113:
5108:
5103:
5098:
5093:
5088:
5083:
5078:
5072:
5070:
5064:
5063:
5061:
5060:
5055:
5050:
5045:
5040:
5035:
5030:
5025:
5020:
5015:
5010:
5005:
5000:
4995:
4990:
4985:
4980:
4975:
4970:
4965:
4963:degree Celsius
4960:
4955:
4949:
4947:
4943:Derived units
4939:
4938:
4936:
4935:
4930:
4925:
4920:
4915:
4910:
4905:
4899:
4897:
4891:
4890:
4883:
4882:
4875:
4868:
4860:
4851:
4850:
4848:
4847:
4845:Zodiacal light
4842:
4837:
4832:
4827:
4822:
4817:
4812:
4806:
4804:
4800:
4799:
4797:
4796:
4789:
4784:
4778:
4776:
4770:
4769:
4767:
4766:
4761:
4756:
4751:
4746:
4740:
4738:
4732:
4731:
4724:
4722:
4720:
4719:
4714:
4709:
4704:
4698:
4696:
4690:
4689:
4681:
4680:
4673:
4666:
4658:
4649:
4648:
4646:
4645:
4640:
4635:
4633:Time metrology
4630:
4625:
4620:
4615:
4610:
4609:
4608:
4598:
4592:
4590:
4589:Related topics
4586:
4585:
4583:
4582:
4577:
4572:
4567:
4562:
4557:
4552:
4547:
4542:
4537:
4532:
4527:
4522:
4517:
4512:
4507:
4502:
4497:
4492:
4486:
4484:
4477:
4476:
4474:
4473:
4468:
4463:
4458:
4452:
4450:
4444:
4443:
4441:
4440:
4435:
4430:
4424:
4422:
4418:
4417:
4415:
4414:
4409:
4404:
4399:
4394:
4389:
4384:
4379:
4374:
4369:
4364:
4359:
4354:
4349:
4344:
4339:
4334:
4328:
4323:
4318:
4313:
4307:
4305:
4299:
4298:
4296:
4295:
4290:
4285:
4280:
4278:Dialing scales
4275:
4270:
4265:
4264:
4263:
4253:
4248:
4243:
4238:
4233:
4228:
4223:
4218:
4213:
4207:
4205:
4199:
4198:
4196:
4195:
4190:
4185:
4180:
4175:
4170:
4165:
4160:
4155:
4150:
4145:
4140:
4135:
4130:
4124:
4122:
4116:
4115:
4113:
4112:
4110:Prime meridian
4107:
4102:
4100:Ephemeris time
4096:
4094:
4090:
4089:
4076:
4074:
4072:
4071:
4069:180th meridian
4066:
4061:
4056:
4051:
4046:
4041:
4036:
4031:
4026:
4021:
4016:
4011:
4006:
4001:
3996:
3991:
3986:
3981:
3976:
3971:
3966:
3965:
3964:
3953:
3951:
3947:
3946:
3944:
3943:
3938:
3933:
3927:
3924:
3923:
3912:
3911:
3904:
3897:
3889:
3880:
3879:
3877:
3876:
3866:
3855:
3852:
3851:
3849:
3848:
3843:
3838:
3833:
3826:
3821:
3816:
3811:
3806:
3800:
3798:
3794:
3793:
3790:
3789:
3787:
3786:
3784:Time geography
3781:
3776:
3774:Clock reaction
3771:
3770:
3769:
3759:
3753:
3751:
3747:
3746:
3744:
3743:
3738:
3733:
3728:
3723:
3718:
3713:
3708:
3703:
3698:
3693:
3687:
3685:
3679:
3678:
3676:
3675:
3670:
3665:
3664:
3663:
3658:
3653:
3648:
3643:
3638:
3627:
3625:
3616:
3609:
3608:
3606:
3605:
3592:
3587:
3582:
3577:
3576:
3575:
3573:time signature
3570:
3560:
3555:
3550:
3544:
3542:
3531:
3530:
3528:
3527:
3526:
3525:
3515:
3514:
3513:
3503:
3498:
3493:
3488:
3483:
3477:
3475:
3473:
3472:
3467:
3461:
3458:
3457:
3455:
3454:
3447:
3445:Temporal parts
3442:
3437:
3432:
3427:
3422:
3417:
3415:Eternal return
3412:
3407:
3402:
3400:Chronocentrism
3397:
3392:
3386:
3384:
3378:
3377:
3375:
3374:
3369:
3364:
3359:
3354:
3349:
3344:
3338:
3336:
3334:
3333:
3328:
3322:
3319:
3318:
3315:
3314:
3312:
3311:
3310:
3309:
3295:
3290:
3285:
3280:
3279:
3278:
3273:
3272:
3271:
3266:
3256:
3251:
3246:
3241:
3240:
3239:
3229:
3228:
3227:
3211:
3209:
3203:
3202:
3200:
3199:
3192:
3187:
3185:Hindu Panchang
3182:
3177:
3172:
3167:
3162:
3157:
3152:
3151:
3150:
3145:
3140:
3129:
3127:
3121:
3120:
3118:
3117:
3112:
3107:
3102:
3097:
3092:
3087:
3082:
3077:
3072:
3067:
3062:
3057:
3052:
3047:
3041:
3039:
3031:
3030:
3028:
3027:
3022:
3017:
3012:
3007:
3001:
2999:
2990:
2979:
2978:
2976:
2975:
2970:
2965:
2960:
2954:
2952:
2948:
2947:
2940:
2939:
2932:
2925:
2917:
2911:
2910:
2898:
2884:
2870:
2869:External links
2867:
2864:
2863:
2839:
2800:(3): 147–156.
2780:
2751:
2720:
2717:on 2017-08-29.
2696:
2667:
2636:
2607:
2579:
2560:
2553:
2535:
2528:
2510:
2481:
2452:
2428:
2410:
2381:
2361:
2338:
2288:
2258:
2207:
2136:
2107:
2077:(1–2): 29–48.
2050:
2020:
1991:
1962:
1929:
1895:
1865:
1832:
1799:
1769:
1751:
1724:
1702:"sidereal day"
1690:
1659:
1628:
1615:
1597:
1575:
1574:
1572:
1569:
1567:
1566:
1561:
1556:
1550:
1545:
1540:
1534:
1532:
1529:
1502:Main article:
1499:
1496:
1474:civil twilight
1440:Main article:
1437:
1434:
1383:minutes of arc
1367:Main article:
1364:
1361:
1349:
1346:
1320:ancient Romans
1259:
1258:
1217:
1215:
1208:
1177:
1174:
1171:
1170:
1167:
1164:
1159:
1155:
1154:
1151:
1148:
1143:
1139:
1138:
1135:
1132:
1127:
1123:
1122:
1119:
1116:
1111:
1107:
1106:
1103:
1100:
1095:
1091:
1090:
1087:
1084:
1081:
1077:
1076:
1071:
1066:
1061:
1041:
1038:
1001:– the Earth's
989:Mainly due to
976:
973:
972:
971:
967:
966:
962:
961:
950:
931:
915:
914:
910:
909:
894:
879:calendar dates
863:
835:
832:
829:
817:
816:
808:
805:
727:
724:
677:Main article:
674:
671:
668:
667:
664:
658:
657:
654:
648:
647:
644:
638:
637:
634:
628:
627:
624:
618:
617:
614:
608:
607:
604:
598:
597:
594:
588:
587:
582:
576:
575:
566:
560:
559:
556:
498:
495:
453:
450:
351:
348:
346:
343:
335:Proto-Germanic
282:
279:
207:Jewish Sabbath
191:12-hour clocks
164:lunar calendar
156:solar calendar
65:
64:
55:
54:
53:
44:
43:
42:
33:
32:
31:
30:
29:
15:
9:
6:
4:
3:
2:
5233:
5222:
5221:Units of time
5219:
5217:
5214:
5212:
5209:
5208:
5206:
5191:
5183:
5182:
5179:
5173:
5170:
5168:
5165:
5163:
5160:
5158:
5155:
5153:
5150:
5149:
5147:
5143:
5137:
5134:
5132:
5129:
5127:
5124:
5122:
5119:
5117:
5114:
5112:
5109:
5107:
5104:
5102:
5099:
5097:
5096:degree of arc
5094:
5092:
5089:
5087:
5084:
5082:
5079:
5077:
5074:
5073:
5071:
5069:
5065:
5059:
5056:
5054:
5051:
5049:
5046:
5044:
5041:
5039:
5036:
5034:
5031:
5029:
5026:
5024:
5021:
5019:
5016:
5014:
5011:
5009:
5006:
5004:
5001:
4999:
4996:
4994:
4991:
4989:
4986:
4984:
4981:
4979:
4976:
4974:
4971:
4969:
4966:
4964:
4961:
4959:
4956:
4954:
4951:
4950:
4948:
4946:
4940:
4934:
4931:
4929:
4926:
4924:
4921:
4919:
4916:
4914:
4911:
4909:
4906:
4904:
4901:
4900:
4898:
4896:
4892:
4888:
4881:
4876:
4874:
4869:
4867:
4862:
4861:
4858:
4846:
4843:
4841:
4838:
4836:
4833:
4831:
4828:
4826:
4823:
4821:
4818:
4816:
4813:
4811:
4810:Belt of Venus
4808:
4807:
4805:
4801:
4795:
4794:
4793:Brahmamuhurta
4790:
4788:
4787:Witching hour
4785:
4783:
4780:
4779:
4777:
4775:
4771:
4765:
4762:
4760:
4757:
4755:
4752:
4750:
4747:
4745:
4742:
4741:
4739:
4737:
4733:
4728:
4718:
4715:
4713:
4710:
4708:
4705:
4703:
4700:
4699:
4697:
4695:
4691:
4687:
4679:
4674:
4672:
4667:
4665:
4660:
4659:
4656:
4644:
4641:
4639:
4636:
4634:
4631:
4629:
4626:
4624:
4621:
4619:
4616:
4614:
4611:
4607:
4604:
4603:
4602:
4599:
4597:
4594:
4593:
4591:
4587:
4581:
4578:
4576:
4573:
4571:
4568:
4566:
4563:
4561:
4558:
4556:
4553:
4551:
4548:
4546:
4543:
4541:
4538:
4536:
4533:
4531:
4528:
4526:
4523:
4521:
4518:
4516:
4513:
4511:
4508:
4506:
4503:
4501:
4498:
4496:
4493:
4491:
4488:
4487:
4485:
4483:
4482:units of time
4478:
4472:
4471:Sidereal time
4469:
4467:
4464:
4462:
4459:
4457:
4456:Galactic year
4454:
4453:
4451:
4449:
4445:
4439:
4436:
4434:
4431:
4429:
4426:
4425:
4423:
4419:
4413:
4412:Weekday names
4410:
4408:
4405:
4403:
4402:Tropical year
4400:
4398:
4395:
4393:
4390:
4388:
4385:
4383:
4380:
4378:
4375:
4373:
4370:
4368:
4367:Intercalation
4365:
4363:
4360:
4358:
4355:
4353:
4350:
4348:
4345:
4343:
4340:
4338:
4335:
4333:(lunar Hijri)
4332:
4329:
4327:
4324:
4322:
4319:
4317:
4314:
4312:
4309:
4308:
4306:
4304:
4300:
4294:
4291:
4289:
4286:
4284:
4281:
4279:
4276:
4274:
4271:
4269:
4266:
4262:
4259:
4258:
4257:
4254:
4252:
4249:
4247:
4244:
4242:
4239:
4237:
4234:
4232:
4229:
4227:
4224:
4222:
4219:
4217:
4214:
4212:
4209:
4208:
4206:
4204:
4200:
4194:
4191:
4189:
4186:
4184:
4181:
4179:
4176:
4174:
4173:Time dilation
4171:
4169:
4166:
4164:
4161:
4159:
4156:
4154:
4151:
4149:
4146:
4144:
4141:
4139:
4136:
4134:
4131:
4129:
4126:
4125:
4123:
4121:
4117:
4111:
4108:
4106:
4103:
4101:
4098:
4097:
4095:
4091:
4086:
4080:
4070:
4067:
4065:
4062:
4060:
4057:
4055:
4052:
4050:
4047:
4045:
4042:
4040:
4037:
4035:
4032:
4030:
4027:
4025:
4022:
4020:
4017:
4015:
4012:
4010:
4009:24-hour clock
4007:
4005:
4004:12-hour clock
4002:
4000:
3997:
3995:
3992:
3990:
3987:
3985:
3982:
3980:
3977:
3975:
3972:
3970:
3967:
3963:
3960:
3959:
3958:
3955:
3954:
3952:
3948:
3942:
3939:
3937:
3934:
3932:
3929:
3928:
3925:
3921:
3917:
3910:
3905:
3903:
3898:
3896:
3891:
3890:
3887:
3875:
3867:
3865:
3857:
3856:
3853:
3847:
3844:
3842:
3839:
3837:
3834:
3832:
3831:
3827:
3825:
3822:
3820:
3817:
3815:
3812:
3810:
3807:
3805:
3802:
3801:
3799:
3795:
3785:
3782:
3780:
3777:
3775:
3772:
3768:
3765:
3764:
3763:
3762:Chronobiology
3760:
3758:
3755:
3754:
3752:
3748:
3742:
3739:
3737:
3734:
3732:
3729:
3727:
3724:
3722:
3719:
3717:
3714:
3712:
3709:
3707:
3704:
3702:
3699:
3697:
3696:Arrow of time
3694:
3692:
3689:
3688:
3686:
3684:
3680:
3674:
3671:
3669:
3668:Geochronology
3666:
3662:
3659:
3657:
3654:
3652:
3649:
3647:
3644:
3642:
3639:
3637:
3634:
3633:
3632:
3629:
3628:
3626:
3624:
3620:
3617:
3615:
3610:
3604:
3600:
3596:
3593:
3591:
3588:
3586:
3583:
3581:
3578:
3574:
3571:
3569:
3566:
3565:
3564:
3561:
3559:
3556:
3554:
3551:
3549:
3546:
3545:
3543:
3541:
3536:
3532:
3524:
3521:
3520:
3519:
3518:Wheel of time
3516:
3512:
3509:
3508:
3507:
3504:
3502:
3499:
3497:
3494:
3492:
3489:
3487:
3484:
3482:
3479:
3478:
3476:
3471:
3468:
3466:
3463:
3462:
3459:
3453:
3452:
3448:
3446:
3443:
3441:
3438:
3436:
3433:
3431:
3428:
3426:
3423:
3421:
3418:
3416:
3413:
3411:
3408:
3406:
3403:
3401:
3398:
3396:
3393:
3391:
3388:
3387:
3385:
3383:
3379:
3373:
3370:
3368:
3365:
3363:
3362:Periodization
3360:
3358:
3355:
3353:
3350:
3348:
3345:
3343:
3340:
3339:
3337:
3332:
3329:
3327:
3324:
3323:
3320:
3308:
3307:
3303:
3302:
3301:
3300:
3296:
3294:
3291:
3289:
3288:Digital clock
3286:
3284:
3281:
3277:
3274:
3270:
3267:
3265:
3262:
3261:
3260:
3257:
3255:
3252:
3250:
3247:
3245:
3242:
3238:
3235:
3234:
3233:
3230:
3226:
3223:
3222:
3221:
3218:
3217:
3216:
3213:
3212:
3210:
3208:
3204:
3198:
3197:
3193:
3191:
3188:
3186:
3183:
3181:
3178:
3176:
3173:
3171:
3168:
3166:
3163:
3161:
3158:
3156:
3153:
3149:
3146:
3144:
3141:
3139:
3136:
3135:
3134:
3131:
3130:
3128:
3126:
3122:
3116:
3113:
3111:
3108:
3106:
3103:
3101:
3098:
3096:
3093:
3091:
3088:
3086:
3083:
3081:
3078:
3076:
3073:
3071:
3068:
3066:
3065:Relative hour
3063:
3061:
3060:24-hour clock
3058:
3056:
3055:12-hour clock
3053:
3051:
3048:
3046:
3043:
3042:
3040:
3038:
3032:
3026:
3023:
3021:
3018:
3016:
3013:
3011:
3008:
3006:
3003:
3002:
3000:
2998:
2994:
2991:
2989:
2984:
2980:
2974:
2971:
2969:
2966:
2964:
2961:
2959:
2956:
2955:
2953:
2949:
2945:
2938:
2933:
2931:
2926:
2924:
2919:
2918:
2915:
2908:
2903:
2899:
2897:at Wiktionary
2896:
2895:
2889:
2885:
2882:
2877:
2873:
2872:
2853:
2849:
2843:
2835:
2831:
2826:
2821:
2817:
2813:
2808:
2803:
2799:
2795:
2791:
2784:
2769:
2765:
2761:
2755:
2740:
2736:
2735:
2730:
2724:
2713:
2706:
2700:
2686:on 2019-09-27
2685:
2681:
2677:
2671:
2656:
2652:
2651:
2646:
2640:
2625:
2621:
2617:
2611:
2604:
2592:
2589:
2588:"evening, n."
2583:
2576:. p. 11.
2575:
2571:
2564:
2556:
2554:0-8493-2342-8
2550:
2546:
2539:
2531:
2525:
2521:
2514:
2499:
2495:
2491:
2485:
2470:
2466:
2462:
2456:
2432:
2414:
2399:
2395:
2391:
2385:
2378:
2374:
2370:
2365:
2359:
2355:
2352:
2350:
2342:
2326:
2322:
2318:
2314:
2310:
2306:
2302:
2295:
2293:
2276:
2272:
2268:
2262:
2244:
2240:
2236:
2229:
2222:
2220:
2218:
2216:
2214:
2212:
2196:
2192:
2188:
2184:
2180:
2176:
2172:
2168:
2164:
2160:
2156:
2152:
2145:
2143:
2141:
2125:
2121:
2117:
2111:
2096:
2092:
2088:
2084:
2080:
2076:
2072:
2068:
2061:
2059:
2057:
2055:
2039:
2035:
2031:
2024:
2010:on 2018-06-13
2009:
2005:
2001:
1995:
1981:on 2011-01-10
1980:
1976:
1972:
1966:
1952:on 2014-11-11
1951:
1947:
1943:
1939:
1933:
1917:
1913:
1912:
1906:
1899:
1883:
1879:
1875:
1869:
1853:
1849:
1848:
1843:
1836:
1820:
1816:
1815:
1809:
1803:
1788:
1784:
1780:
1773:
1758:
1754:
1752:0-387-98746-0
1748:
1744:
1740:
1739:
1734:
1728:
1713:
1709:
1708:
1703:
1697:
1695:
1687:
1675:
1671:
1663:
1648:
1644:
1643:
1638:
1632:
1625:
1619:
1611:
1607:
1601:
1594:
1590:
1586:
1580:
1576:
1565:
1562:
1560:
1557:
1554:
1551:
1549:
1546:
1544:
1541:
1539:
1536:
1535:
1528:
1526:
1522:
1518:
1514:
1510:
1505:
1493:
1489:
1485:
1483:
1479:
1475:
1471:
1467:
1463:
1459:
1455:
1448:
1443:
1433:
1431:
1427:
1423:
1419:
1415:
1411:
1407:
1403:
1399:
1394:
1391:
1388:
1384:
1379:
1375:
1370:
1360:
1355:
1345:
1343:
1339:
1334:
1332:
1331:ancient Egypt
1327:
1325:
1321:
1316:
1314:
1310:
1306:
1302:
1301:Christmas Eve
1298:
1294:
1290:
1286:
1282:
1277:
1273:
1268:
1266:
1255:
1252:
1244:
1234:
1230:
1224:
1223:
1218:This section
1216:
1212:
1207:
1206:
1200:
1199:
1194:
1190:
1186:
1182:
1168:
1165:
1163:
1160:
1157:
1156:
1152:
1149:
1147:
1144:
1141:
1140:
1136:
1133:
1131:
1130:Carboniferous
1128:
1125:
1124:
1120:
1117:
1115:
1112:
1109:
1108:
1104:
1101:
1099:
1096:
1093:
1092:
1088:
1085:
1082:
1079:
1078:
1075:
1072:
1070:
1067:
1065:
1062:
1060:
1057:
1056:
1053:
1051:
1047:
1046:John W. Wells
1037:
1035:
1031:
1023:
1019:
1010:
1009:per century.
1008:
1004:
1000:
996:
993:– the Moon's
992:
986:
982:
969:
968:
964:
963:
959:
955:
951:
948:
944:
940:
936:
932:
929:
925:
921:
917:
916:
912:
911:
907:
903:
899:
895:
892:
888:
884:
880:
876:
872:
871:ordinal dates
868:
864:
860:
854:
849:
847:
842:
841:
836:
833:
830:
827:
824:(exactly) (a
823:
819:
818:
814:
813:
812:
804:
803:
799:
795:
791:
777:
763:
759:
755:
751:
742:
737:
733:
723:
721:
717:
713:
709:
706:
702:
698:
694:
690:
686:
680:
665:
663:
660:
659:
655:
653:
650:
649:
645:
643:
640:
639:
635:
633:
630:
629:
625:
623:
620:
619:
615:
613:
610:
609:
605:
603:
600:
599:
595:
593:
590:
589:
583:
581:
578:
577:
567:
565:
562:
561:
557:
554:
553:
550:
548:
543:
541:
537:
533:
529:
522:
517:
512:
508:
507:Sidereal time
504:
494:
491:
489:
485:
481:
476:
474:
471:, which uses
470:
465:
461:
460:
449:
447:
443:
439:
434:
430:
428:
423:
421:
417:
413:
409:
404:
402:
398:
394:
388:
386:
385:tropical year
381:
377:
373:
369:
361:
356:
342:
340:
336:
332:
328:
324:
320:
316:
312:
308:
304:
300:
292:
288:
278:
275:
271:
267:
263:
259:
255:
251:
247:
243:
239:
235:
231:
227:
223:
218:
216:
212:
208:
204:
200:
199:standard time
196:
192:
188:
184:
180:
175:
173:
169:
165:
161:
157:
153:
149:
145:
141:
137:
132:
130:
126:
122:
118:
114:
110:
106:
102:
98:
94:
90:
86:
83:
79:
69:
59:
48:
37:
26:
22:
5101:electronvolt
5085:
4835:Midnight sun
4791:
4685:
4618:Decimal time
4529:
4347:Astronomical
4226:Complication
4221:Atomic clock
3836:Time capsule
3830:Tempus fugit
3828:
3750:Other fields
3449:
3430:Perdurantism
3352:Calendar era
3304:
3297:
3283:Cuckoo clock
3220:astronomical
3194:
3020:Unit of time
2951:Key concepts
2909:at Wikiquote
2893:
2855:. Retrieved
2851:
2842:
2797:
2793:
2783:
2772:. Retrieved
2763:
2754:
2743:. Retrieved
2732:
2723:
2712:the original
2699:
2688:. Retrieved
2684:the original
2670:
2659:. Retrieved
2648:
2639:
2627:. Retrieved
2619:
2610:
2602:
2597:18 September
2595:. Retrieved
2590:
2582:
2569:
2563:
2544:
2538:
2519:
2513:
2502:. Retrieved
2493:
2484:
2473:. Retrieved
2464:
2455:
2431:
2413:
2402:. Retrieved
2393:
2384:
2376:
2372:
2369:s:zh:清史稿/卷48
2364:
2348:
2341:
2329:. Retrieved
2312:
2309:L'Astronomie
2308:
2300:
2299:J.Kovalesky
2279:. Retrieved
2261:
2250:. Retrieved
2238:
2234:
2199:. Retrieved
2158:
2154:
2128:. Retrieved
2119:
2110:
2099:. Retrieved
2074:
2070:
2042:. Retrieved
2033:
2023:
2012:. Retrieved
2008:the original
2003:
1994:
1983:. Retrieved
1979:the original
1974:
1965:
1954:. Retrieved
1950:the original
1945:
1932:
1920:. Retrieved
1908:
1898:
1886:. Retrieved
1877:
1868:
1856:. Retrieved
1845:
1835:
1823:. Retrieved
1819:the original
1811:
1802:
1791:. Retrieved
1783:gml.noaa.gov
1782:
1772:
1761:. Retrieved
1737:
1727:
1716:. Retrieved
1705:
1684:
1678:. Retrieved
1662:
1651:. Retrieved
1640:
1631:
1623:
1618:
1600:
1584:
1579:
1507:
1492:Night in art
1452:
1430:productivity
1395:
1372:
1357:
1341:
1337:
1335:
1328:
1317:
1296:
1272:Hebrew Bible
1269:
1262:
1247:
1238:
1227:Please help
1222:verification
1219:
1196:
1073:
1068:
1063:
1058:
1043:
1018:leap seconds
1011:
1007:milliseconds
988:
886:
874:
866:
858:
852:
844:
840:nychthemeron
838:
826:nychthemeron
810:
801:
798:sidereal day
793:
789:
775:
761:
758:sidereal day
747:
732:decimal time
712:ground state
687:(SI), a day
682:
592:Earth's Moon
544:
528:sidereal day
525:
497:Sidereal day
492:
488:calendar day
477:
458:
455:
438:Solar System
435:
431:
424:
405:
389:
371:
367:
365:
338:
314:
306:
298:
290:
284:
250:sidereal day
219:
176:
160:four seasons
133:
77:
75:
4840:Polar night
4815:Golden hour
4684:Parts of a
4628:System time
4623:Metric time
4342:Solar Hijri
4268:Water clock
4251:Radio clock
4183:Time domain
4163:Proper time
4049:Leap second
3931:Chronometry
3846:Time travel
3824:System time
3731:Time domain
3716:Proper time
3540:use of time
3511:Father Time
3491:Immortality
3481:Ages of Man
3410:Endurantism
3367:Regnal year
3347:Big History
3276:water-based
3175:Solar Hijri
3085:Hexadecimal
3035:Measurement
2997:Chronometry
2983:Measurement
2591:www.oed.com
2426:+ 34′ = 50′
1946:SI Brochure
1559:Synodic day
1309:Saint Agnes
981:Leap second
754:metric time
736:Metric time
532:stellar day
416:culmination
345:Definitions
287:Old English
270:leap second
256:) used for
252:(using the
246:stellar day
228:) used for
172:lunar phase
131:processes.
5205:Categories
4895:Base units
4820:Terminator
4643:Timekeeper
4596:Chronology
4580:Millennium
4466:Precession
4372:Julian day
4193:T-symmetry
4054:Solar time
4024:Civil time
3548:Chronemics
3523:Kalachakra
3435:Presentism
3420:Eternalism
3326:Chronology
3264:mechanical
3215:Main types
3133:Main types
2857:2023-10-30
2794:Somnologie
2774:2022-08-22
2745:2022-08-22
2690:2011-07-22
2661:2022-08-22
2624:Britannica
2620:Britannica
2504:2022-08-22
2475:2022-08-22
2404:2022-08-22
2347:Plutarch,
2252:2022-08-20
2201:2022-08-20
2130:2017-02-01
2101:2022-08-21
2071:KronoScope
2044:2022-08-21
2014:2015-10-17
1985:2015-10-17
1956:2015-01-27
1858:18 January
1793:2022-08-17
1763:2022-08-17
1718:2022-08-17
1680:2011-06-03
1653:2022-08-17
1571:References
1460:and after
1393:12 hours.
1387:atmosphere
1352:See also:
1293:Florentine
1176:Boundaries
1098:Cretaceous
891:week dates
459:time zones
195:time zones
87:of a full
5038:steradian
4953:becquerel
4830:Moonlight
4764:Blue hour
4712:Afternoon
4540:Fortnight
4387:Lunisolar
4377:Leap year
4311:Gregorian
4261:stopwatch
4236:Hourglass
4216:Astrarium
4133:Spacetime
4064:Time zone
3941:Metrology
3920:standards
3804:Leap year
3721:Spacetime
3595:Yesterday
3496:Dreamtime
3470:Mythology
3357:Deep time
3269:stopwatch
3244:hourglass
3225:astrarium
3155:Gregorian
3148:Lunisolar
3125:Calendars
3115:Time zone
2988:standards
2816:1432-9123
2281:August 6,
2191:124701789
2183:0004-6256
2091:1567-715X
1940:(2014) .
1911:space.com
1847:The Verge
1402:afternoon
1305:Halloween
1285:magnitude
1263:For most
1137:22 hours
1089:24 hours
943:afternoon
705:hyperfine
701:radiation
540:astronomy
464:railroads
452:Civil day
393:longitude
383:one mean
372:solar day
319:Norwegian
303:Icelandic
281:Etymology
258:astronomy
230:computers
215:astronomy
136:calendars
113:afternoon
5190:Category
5145:See also
4918:kilogram
4887:SI units
4825:Daylight
4782:Midnight
4736:Twilight
4601:Duration
4575:Saeculum
4555:Olympiad
4397:Solstice
4326:Holocene
4303:Calendar
4203:Horology
3994:ISO 8601
3989:ISO 31-1
3864:Category
3612:Time in
3603:Tomorrow
3465:Religion
3405:Duration
3372:Timeline
3306:Timeline
3105:Sidereal
2973:Eternity
2834:31534436
2768:Archived
2739:Archived
2655:Archived
2498:Archived
2469:Archived
2398:Archived
2354:Archived
2325:Archived
2303:(1969).
2275:Archived
2273:. 2013.
2243:Archived
2195:Archived
2124:Archived
2095:Archived
2038:Archived
1916:Archived
1882:Archived
1878:nasa.gov
1852:Archived
1787:Archived
1757:Archived
1743:Springer
1712:Archived
1674:Archived
1647:Archived
1610:Archived
1548:ISO 8601
1531:See also
1454:Twilight
1442:Twilight
1436:Twilight
1390:refracts
1378:sunlight
1313:holidays
1289:Medieval
1241:May 2023
1162:Cambrian
1146:Devonian
1114:Triassic
1083:Current
1080:Present
906:workweek
898:work day
859:24 hours
853:24 hours
815:Full day
790:décade –
748:Various
693:SI units
536:rotation
480:midnight
442:universe
420:midnight
408:meridian
401:sundials
183:12:00 am
179:midnight
99:(86,400
5106:hectare
5091:decibel
5033:sievert
5028:siemens
4958:coulomb
4908:candela
4803:Related
4749:Sunrise
4717:Evening
4702:Morning
4694:Daytime
4570:Century
4560:Lustrum
4490:Instant
4362:Equinox
4331:Islamic
4273:Sundial
4138:Chronon
3874:Commons
3797:Related
3711:Instant
3701:Chronon
3683:Physics
3623:Geology
3614:science
3486:Destiny
3331:History
3299:History
3254:sundial
3237:quantum
3180:Chinese
3170:Islamic
3080:Decimal
3075:Chinese
3037:systems
2963:Present
2825:6751071
2729:"night"
2448:
2436:
2421:⁄
2317:Bibcode
2315:: 411.
2163:Bibcode
1922:May 30,
1888:May 30,
1825:May 29,
1543:Holiday
1458:sunrise
1410:sunrise
1406:evening
1398:morning
1374:Daytime
1369:Daytime
1363:Daytime
1338:Turkish
1276:Genesis
1270:In the
1265:diurnal
1050:fossils
947:evening
945:", or "
939:morning
924:sunrise
920:horizon
913:Daytime
902:man-day
794:décades
783:⁄
769:⁄
750:decimal
716:caesium
714:of the
710:of the
683:In the
652:Neptune
622:Jupiter
564:Mercury
414:(upper
327:Swedish
262:tropics
226:seconds
117:evening
105:morning
101:seconds
80:is the
21:Daytime
5121:minute
5081:dalton
5023:radian
5018:pascal
5008:newton
4933:second
4913:kelvin
4903:ampere
4754:Sunset
4565:Decade
4520:Moment
4515:Minute
4510:Second
4480:Other
4337:Julian
4316:Hebrew
3962:offset
3814:Moment
3809:Memory
3661:period
3249:marine
3232:atomic
3207:Clocks
3165:Hebrew
3160:Julian
3095:Metric
2968:Future
2832:
2822:
2814:
2629:17 Sep
2551:
2526:
2331:5 June
2189:
2181:
2089:
1749:
1591:
1553:Season
1480:, and
1462:sunset
1418:sunset
1404:, and
1342:French
1281:Jewish
1201:, 1493
928:sunset
900:, cf.
708:levels
666:153.3
642:Uranus
632:Saturn
616:9–9.1
596:708.7
509:, and
469:UTC±00
339:*dagaz
323:Danish
313:, and
311:German
244:, and
211:Friday
148:months
119:, and
85:period
5136:tonne
5131:neper
5116:litre
5058:weber
5043:tesla
4998:lumen
4993:katal
4988:joule
4983:hertz
4978:henry
4968:farad
4923:metre
4774:Night
4606:music
4545:Month
4505:Jiffy
4500:Shake
4495:Flick
4392:Solar
4382:Lunar
4357:Epact
4321:Hindu
4256:Watch
4211:Clock
3819:Space
3651:epoch
3641:chron
3599:Today
3568:tempo
3563:Music
3425:Event
3259:watch
3143:Lunar
3138:Solar
3110:Solar
3100:Roman
3090:Hindu
2715:(PDF)
2708:(PDF)
2351:, 84.
2246:(PDF)
2231:(PDF)
2187:S2CID
1637:"day"
1509:Night
1504:Night
1498:Night
1348:Parts
965:Other
889:) in
877:) in
869:) in
846:night
822:hours
778:) is
776:milli
764:) is
718:-133
662:Pluto
656:16.1
646:17.2
636:10.7
612:Ceres
606:24.7
580:Venus
555:Name
547:Earth
521:Ceres
418:) or
337:root
331:Dutch
299:dagur
295:/dæj/
289:term
213:. In
152:years
144:weeks
140:dates
121:night
97:hours
5111:hour
5053:watt
5048:volt
4973:gray
4928:mole
4759:Dusk
4744:Dawn
4707:Noon
4550:Year
4535:Week
4525:Hour
3979:DUT1
3918:and
3538:and
3501:Kāla
3196:List
3190:Maya
2986:and
2958:Past
2944:Time
2830:PMID
2812:ISSN
2680:USNO
2631:2023
2599:2023
2549:ISBN
2524:ISBN
2345:See
2333:2021
2283:2016
2271:IERS
2179:ISSN
2087:ISSN
1938:BIPM
1924:2021
1909:www.
1890:2021
1860:2019
1827:2021
1814:NASA
1747:ISBN
1589:ISBN
1521:dawn
1519:and
1517:dusk
1513:dark
1470:dusk
1466:dawn
1414:noon
1412:and
1189:Moon
1187:and
1166:425
1150:410
1134:400
1118:390
1102:380
1086:365
1059:Date
983:and
958:dusk
954:dawn
941:", "
904:and
848:-day
802:cés.
785:1000
762:deci
734:and
720:atom
626:9.9
602:Mars
585:2802
412:noon
397:year
329:and
248:and
232:and
168:Moon
154:. A
150:and
129:life
109:noon
82:time
5211:Day
5086:day
5013:ohm
5003:lux
4686:day
4530:Day
3656:era
3646:eon
3636:age
3015:TAI
3005:UTC
2907:Day
2894:day
2881:Day
2820:PMC
2802:doi
2439:50°
2419:32′
2377:夜子初
2371:: 起
2171:doi
2159:136
2079:doi
1329:In
1231:by
1195:'s
1185:Sun
926:to
887:dow
881:or
875:dom
867:doy
820:24
752:or
571:222
530:or
403:).
368:day
317:in
315:dag
309:in
307:Tag
301:in
291:dæġ
274:UTC
189:or
187:24-
185:in
170:'s
138:as
93:Sun
78:day
5207::
3974:ΔT
3969:UT
3601:–
3597:–
3010:UT
2850:.
2828:.
2818:.
2810:.
2798:23
2796:.
2792:.
2766:.
2762:.
2737:.
2731:.
2678:.
2653:.
2647:.
2622:.
2618:.
2601:.
2572:.
2496:.
2492:.
2467:.
2463:.
2445:60
2396:.
2392:.
2375:，盡
2373:子正
2323:.
2313:83
2311:.
2307:.
2291:^
2241:.
2237:.
2233:.
2210:^
2193:.
2185:.
2177:.
2169:.
2157:.
2153:.
2139:^
2122:.
2118:.
2093:.
2085:.
2073:.
2069:.
2053:^
2036:.
2032:.
2002:.
1973:.
1944:.
1914:.
1907:.
1880:.
1876:.
1850:.
1844:.
1810:.
1781:.
1755:.
1741:.
1710:.
1704:.
1693:^
1683:.
1672:.
1645:.
1639:.
1476:,
1400:,
1322:,
1303:,
1274:,
1191:,
1026:SI
1014:SI
960:".
949:".
935:am
771:10
573:.6
526:A
505:,
490:.
475:.
387:.
341:.
325:,
321:,
305:,
264:,
236:,
222:SI
174:.
146:,
115:,
111:,
107:,
76:A
4879:e
4872:t
4865:v
4677:e
4670:t
4663:v
3908:e
3901:t
3894:v
2936:e
2929:t
2922:v
2860:.
2836:.
2804::
2777:.
2748:.
2693:.
2664:.
2633:.
2557:.
2532:.
2507:.
2478:.
2442:/
2423:2
2407:.
2379:。
2335:.
2319::
2285:.
2255:.
2239:1
2204:.
2173::
2165::
2133:.
2104:.
2081::
2075:9
2047:.
2017:.
1988:.
1959:.
1926:.
1892:.
1862:.
1829:.
1796:.
1766:.
1721:.
1656:.
1595:.
1254:)
1248:(
1243:)
1239:(
1225:.
930:)
908:.
893:.
885:(
828:)
781:1
767:1
569:4
391:(
293:(
27:.
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
