2277:
1038:
97:
2271:
341:
655:
727:, stating that "Greenwich time is now kept almost throughout England, but it appears that Greenwich time is not legal time. For example, our polling booths were opened, say, at 8 13 and closed at 4 13 p.m." This was changed later in 1880, when Greenwich Mean Time was legally adopted throughout the island of Great Britain. GMT was adopted in the
1397:
The IRM is the only meridian that may now be described as the prime meridian of the world, as it defines 0° longitude by international agreement. The IRM passes 102.5 metres to the east of the historic Prime
Meridian of the World at the latitude of the Airy Transit Circle here. The entire Observatory
813:
Indeed, even the
Greenwich meridian itself is not quite what it used to beâdefined by "the centre of the transit instrument at the Observatory at Greenwich". Although that instrument still survives in working order, it is no longer in use and now the meridian of origin of the world's longitude and
850:. The latter convention was adopted on and after 1 January 1925 for astronomical purposes, resulting in a discontinuity of 12 hours, or half a day. The instant that was designated as "December 31.5 GMT" in 1924 almanacs became "January 1.0 GMT" in 1925 almanacs. The term
1529:
891:, section 9, provides that whenever an expression of time occurs in any Act, the time referred to shall (unless otherwise specifically stated) be held to be Greenwich mean time. Under subsection 23, the same rule applies to deeds and other instruments.
973:: Interpretation Act, R.S.C. 1985, c. I-21, section 35(1). This refers to "standard time" for the several provinces, defining each in relation to "Greenwich time", but does not use the expression "Greenwich mean time". Several provinces, such as
818:
takes into account when co-ordinating the world's time signals. Nevertheless, the line in the old observatory's courtyard today differs no more than a few metres from that imaginary line which is now the prime meridian of the world.
1597:
the last four seconds of the preceding minute will be heard as 'clicks' when the signal is about to be given, representing the 55th, 56th, 57th, 58th and 59th second, and the final click, which will be a little louder than the
690:
of 1884. Synchronisation of the chronometer on GMT did not affect shipboard time, which was still solar time. But this practice, combined with mariners from other nations drawing from
983:: The term GMT is still in use when it comes to electronics such as cellular phones. Android phones use "UTC" but keypad phones use "GMT" to define any time zone around the world.
2175:
2098:
1886:
977:(Time Definition Act. R.S., c. 469, s. 1), have their own legislation which specifically mentions either "Greenwich Mean Time" or "Greenwich mean solar time".
932:
as appropriate. As the BBC World
Service is broadcast to all time zones, the announcers use the term "Greenwich Mean Time" consistently throughout the year.
2860:
992:
Greenwich Mean Time is defined in law as standard time in the following countries and areas, which also advance their clocks one hour (GMT+1) in summer.
1145:â "the Greenwich Time Lady", daughter of John Henry Belville, who was in the business of daily personal distribution of Greenwich Mean Time via a watch
838:
Historically, GMT has been used with two different conventions for numbering hours. The long-standing astronomical convention, dating from the work of
814:
time is not strictly defined in material form but from a statistical solution resulting from observations of all time-determination stations which the
883:
Legally, the civil time used in the UK is called "Greenwich mean time" (without capitalisation), with an exception made for those periods when the
597:
Originally, astronomers considered a GMT day to start at noon, while for almost everyone else it started at midnight. To avoid confusion, the name
785:, a term introduced in 1928, initially represented mean time at Greenwich determined in the traditional way to accord with the originally defined
1790:
586:
and reaches its highest point in the sky there. This event may occur up to 16 minutes before or after noon GMT, a discrepancy described by the
1629:
1543:
2091:
1115:
815:
1476:
1262:
Astronomers preferred the old convention to simplify their observational data, so that each night was logged under a single calendar date.
894:
During the experiment of 1968 to 1971, when the
British Isles did not revert to Greenwich Mean Time during the winter, the all-year
2629:
2084:
1275:
but simplistically, there is a 15° difference of longitude for each hour that the time of local noon differs from
Greenwich noon.
702:
were based upon GMT, as an offset of a number of hours (and occasionally half or quarter hours) "ahead of GMT" or "behind GMT".
1360:
924:. If announced (such as near the start of summer time or of winter time), announcers on domestic channels declare the time as
552:; as a consequence, it cannot be used to specify a particular time unless a context is given. The term "GMT" is also used as
1986:
858:) was introduced to unambiguously refer to the previous noon-based astronomical convention for GMT. The more specific terms
2598:
770:
constitute a much more stable timebase. On 1 January 1972, GMT as the international civil time standard was superseded by
2865:
1450:
1553:
2349:
1948:
1876:
1659:
1233:
786:
698:
based on observations at
Greenwich, led to GMT being used worldwide as a standard time independent of location. Most
687:
1890:
1107:
790:
1201:
686:
from the
Greenwich meridian, which was considered to have longitude zero degrees, by a convention adopted in the
605:(UTC) or UT1; English speakers often use GMT as a synonym for UTC. For navigation, it is considered equivalent to
1769:
633:
161:
2422:
1858:(2013). "Precession, Nutation, Polar Motion, and Earth Rotation". In Sean Urban; P. Kenneth Seidelmann (eds.).
2603:
1381:
548:. At different times in the past, it has been calculated in different ways, including being calculated from
1195:
1172:
921:
663:
533:
237:
189:
150:
2855:
2558:
2538:
2484:
2369:
2205:
1855:
695:
430:
1272:
2225:
2210:
2148:
2127:
1915:
1731:
1714:
1184:
1148:
771:
609:(the modern form of mean solar time at 0° longitude); but this meaning can differ from UTC by up to 0.9
602:
601:
was introduced in 1928 to denote GMT as counted from midnight. Today, Universal Time usually refers to
583:
2379:
2190:
1797:
846:). This contrasted with the civil convention of referring to midnight as zero hours dating from the
2017:
1053:
Greenwich Mean Time is used as standard time all year round in the following countries and areas:
940:
Several countries define their local time by reference to
Greenwich Mean Time. Some examples are:
2639:
2417:
2319:
2235:
2230:
2028:
1908:
1772:. United States Naval Observatory and Her Majesty's Nautical Almanac Office. 2015. Archived from
1625:
1487:
1325:
1241:
888:
1321:
710:
1491:
723:" to be the official time. On 14 May 1880, a letter signed by "Clerk to Justices" appeared in
2792:
1453:. Her Majesty's Nautical Almanac Office. 2020. "Glossary" s.v. Universal Time. Archived from
1189:
1154:
917:
736:
553:
420:
389:
225:
204:
177:
132:
111:
1296:
2619:
2533:
2359:
2220:
1825:
884:
649:
332:
83:
31:
1532:. Times, London, England, 14 May 1880: 10. The Times Digital Archive. Web. 18 August 2015.
8:
2870:
2829:
2624:
2479:
2344:
1220:
1169: â Type of clock which self-synchronizes its time using dedicated radio transmitters
998:
950:
895:
809:) and UT2 (UT1 further equalised for annual seasonal variations in Earth rotation rate).
659:
425:
415:
155:
17:
2165:
1829:
763:
719:
is derived. It was gradually adopted for other purposes, but a legal case in 1858 held "
2804:
2578:
2502:
2432:
2022:
1997:
1932:
1902:
1841:
1355:
1237:
1160:
1110:
713:
in 1847 and by almost all railway companies by the following year, from which the term
679:
1425:
1350:
1037:
2652:
2517:
2334:
1944:
1872:
1845:
1837:
1655:
1549:
798:
621:
594:) moment of this event, which accounts for the word "mean" in "Greenwich Mean Time".
2797:
2543:
2522:
2474:
2437:
2250:
1833:
744:
587:
571:
448:
394:
209:
96:
2056:
805:
and effectively superseded by refined forms UT1 (UT0 equalised for the effects of
2528:
2507:
2339:
2311:
2076:
1975:
1745:
Office, Office of the Houses of the
Oireachtas House Services Directorate Bills.
806:
752:
720:
691:
675:
591:
529:
471:
356:
282:
2824:
2583:
2573:
2512:
2469:
2301:
2291:
2260:
2160:
2132:
2049:
1398:
and the historic Prime
Meridian now lie to the west of the true prime meridian.
1178:
1026:
954:
775:
671:
617:
613:
s. The term "GMT" should thus not be used for purposes that require precision.
606:
598:
575:
498:
466:
259:
100:
1454:
2849:
2711:
2662:
2647:
2593:
2364:
2200:
2195:
2111:
1959:
1746:
1142:
1077:
1031:
706:
360:
2809:
2696:
2691:
2686:
2673:
2412:
1125:
1057:
847:
767:
715:
288:
276:
375:
142:
121:
62:
2819:
2814:
2459:
2442:
2374:
2354:
2240:
2122:
1166:
1087:
980:
974:
909:
In the UK, UTC+00:00 is disseminated to the general public in winter and
748:
728:
294:
253:
2834:
2787:
2771:
2657:
2563:
2384:
2245:
2215:
2153:
1102:
1062:
910:
843:
629:
625:
579:
564:
560:
513:
494:
478:
452:
437:
401:
299:
264:
241:
229:
214:
193:
181:
166:
1816:
Guinot, Bernard (August 2011). "Solar time, legal time, time in use".
1773:
1223:
is defined in law as being one hour in advance of Greenwich Mean Time.
2731:
2568:
2452:
2427:
2407:
2324:
2276:
2270:
2255:
756:
699:
683:
582:, noon (12:00:00) GMT is rarely the exact moment the Sun crosses the
557:
537:
509:
47:
2766:
2746:
2588:
2494:
2394:
2185:
2180:
2061:
1016:
947:: Decrees of 1946 and 1947 set legal time as one hour ahead of GMT.
545:
340:
1408:
1406:
654:
2761:
2751:
2681:
2553:
2464:
2329:
1976:"LEGISLATIVE SPECIFICATIONS FOR COORDINATING WITH UNIVERSAL TIME"
1498:
1120:
1092:
1082:
961:) is defined as being one hour in advance of GMT. "Winter Time" (
944:
839:
740:
1692:
2756:
2706:
2701:
1895:
1481:
1403:
1072:
1042:
1020:
970:
794:
774:, maintained by an ensemble of atomic clocks around the world.
732:
541:
2736:
2548:
2447:
2402:
1067:
1046:
866:
do not share this ambiguity, always referring to midnight as
2050:
The original BBC World Service GMT time signal in MP3 format
2741:
2726:
2716:
2170:
2107:
2044:
1130:
1097:
549:
2176:
International Earth Rotation and Reference Systems Service
2045:
International Earth Rotation and Reference Systems Service
516:
are to the east and north-east of Madagascar respectively.
2721:
1862:(3rd ed.). Mill Valley CA: University Science Books.
637:
632:; and others particularly in Arab countries, such as the
1788:
1382:"What is the Prime Meridian and why is it in Greenwich?"
1545:
One Time Fits All: The Campaigns for Global Uniformity
1974:
Seago, J.H.; Seidelmann, P. K.; Allen, Steve (2011).
833:
705:
Greenwich Mean Time was adopted across the island of
1973:
1698:
1668:
1574:
1572:
1510:
1652:
Astronomical Supplement to the Astronomical Almanac
916:BBC radio stations broadcast the "six pips" of the
751:from Greenwich Observatory were first broadcast by
320: Pale colours: Standard time observed all year
2106:
1939:McCarthy, Denis D; Seidelmann, P. Kenneth (2009).
1938:
1860:Explanatory Supplement to the Astronomical Almanac
1791:"Legal Aspects of Trusted Time services in Europe"
1412:
920:. It is named from its original generation at the
762:The daily rotation of the Earth is irregular (see
755:on 5 February 1924 at 17:30:00 UTC, rendering the
1569:
503:
487:
2847:
1732:"STANDARD TIME (AMENDMENT) ACT, 1971; Section 1"
1591:"Greenwich Time by Wirelessâ New Scheme Today".
1163: â Clock used on ships to aid in navigation
996:United Kingdom, where the summer time is called
887:orders an hour's shift for daylight saving. The
1789:Dumortier, J; Hannelore, D; Loncke, M. (n.d.).
1253:There is no such thing as the "Greenwich Mean".
1157: â Series of six pips broadcast by the BBC
1853:
1654:. University Science Books. 1992. p. 76.
1626:"Universal Time (UT1) and Length of Day (LOD)"
1610:Street, Sean (2015). "Greenwich Time Signal".
1504:
2092:
504:
488:
1889:. Parliament of Canada. 2005. Archived from
1116:Saint Helena, Ascension and Tristan da Cunha
2861:Geography of the Royal Borough of Greenwich
1747:"AN tACHT UM AM CAIGHDEĂNACH (LEASĂ), 1971"
962:
666:is permanently kept on Greenwich Mean Time.
2099:
2085:
1941:TIMEâFrom Earth Rotation to Atomic Physics
1887:"Interpretation Act, R.S.C. 1985, c. I-21"
1548:. Stanford University Press. p. 134.
842:, was to refer to noon as zero hours (see
90:DST is observed throughout this time zone.
30:"GMT" redirects here. For other uses, see
1689:Dumortier, Hannelore, & Loncke (n.d.)
789:; from 1 January 1956 (as decided by the
2630:International Commission on Stratigraphy
1983:American Astronomical Society Publishing
1685:
1683:
1351:"Interpretation Act 1978: Section 9"
1345:
1343:
1036:
801:) this "raw" form of UT was re-labelled
653:
501:are to the west of the African mainland.
339:
95:
27:Time zone of Western Europe, same as WET
2054:
2031:. Office of the Attorney General. 1971.
2020:. Office of the Attorney General. 1968.
14:
2848:
1815:
1726:
1724:
1709:
1707:
1612:Historical Dictionary of British Radio
1609:
1541:
1443:
1363:, 20 July 1978, 1978 c. 30 (s. 9)
1192: â Time zone in Europe: UTC±00:00
1175: â Observatory in London, England
1013:, changing to Standard Time in summer.
967:) is defined as being the same as GMT.
590:. Noon GMT is the annual average (the
2080:
2029:"Standard Time (Amendment) Act, 1971"
1992:from the original on 4 February 2005.
1957:
1866:
1680:
1674:
1578:
1516:
1340:
873:
766:) and has a slowing trend; therefore
678:, British mariners kept at least one
616:The term "GMT" is especially used by
1715:"STANDARD TIME ACT, 1968; Section 1"
1905:. Parliament of the United Kingdom.
1721:
1704:
24:
1960:"History of legal time in Britain"
1744:
1699:Seago, Seidelmann & Allen 2011
1426:"UTC (Universal Time Coordinated)"
1314:
935:
834:Ambiguity in the definition of GMT
25:
2882:
2350:Discrete time and continuous time
2055:Rodgers, Lucy (20 October 2009).
2038:
1632:from the original on 5 April 2023
1273:History of longitude#Chronometers
878:
743:adopted GMT in 1916, supplanting
688:International Meridian Conference
563:and, in UK law, is the basis for
2275:
2269:
1869:Greenwich time and the longitude
1328:. 2021. What does GMT stand for?
1244:": they are not quite the same.
1108:Sahrawi Arab Democratic Republic
852:Greenwich Mean Astronomical Time
826:Greenwich time and the longitude
791:International Astronomical Union
772:Coordinated Universal Time (UTC)
1738:
1644:
1618:
1614:. Scarecrow Press. p. 156.
1603:
1584:
1535:
1522:
1469:
1418:
1265:
1232:The 'Prime Meridian', 0°, was
634:Middle East Broadcasting Centre
2423:History of timekeeping devices
1595:. 5 February 1924. p. 6.
1413:McCarthy & Seidelmann 2009
1374:
1322:"What is Greenwich Mean Time?"
1289:
1256:
1247:
1226:
1214:
797:in 1955, at the initiative of
759:at the observatory redundant.
13:
1:
1920:Electronic Irish Statute Book
1770:"Astronomical Almanac Online"
1451:"Astronomical Almanac Online"
1282:
1198: â Time zone (UTC+01:00)
1151: â Primary time standard
1477:"Coordinated Universal Time"
1196:Western European Summer Time
1181: â Time zones in Europe
1173:Royal Observatory, Greenwich
1009:Ireland, where it is called
987:
664:Royal Observatory, Greenwich
238:Eastern European Summer Time
190:Central European Summer Time
151:Western European Summer Time
7:
2370:Gravitational time dilation
2206:Barycentric Coordinate Time
1136:
1019:(with the exception of the
922:Royal Greenwich Observatory
674:developed into an advanced
431:South African Standard Time
10:
2887:
2866:Time in the United Kingdom
2226:Geocentric Coordinate Time
2211:Barycentric Dynamical Time
2149:Coordinated Universal Time
1838:10.1088/0026-1394/48/4/S08
1761:
1505:Hilton & McCarthy 2013
1185:Time in the United Kingdom
1149:Coordinated Universal Time
682:on GMT to calculate their
647:
643:
603:Coordinated Universal Time
570:Because of Earth's uneven
29:
2780:
2671:
2638:
2612:
2493:
2393:
2380:Time-translation symmetry
2310:
2284:
2267:
2191:International Atomic Time
2141:
2118:
2018:"Standard Time Act, 1968"
1916:"Interpretation Act 2005"
1903:"Interpretation Act 1978"
1871:. London: Philip Wilson.
221:
173:
128:
89:
81:
74:01:48, 21 September 2024
73:
68:
58:
53:
46:
41:
1734:. Government of Ireland.
1717:. Government of Ireland.
1530:"Time, Actual And Legal"
1386:Royal Museums Greeenwich
1207:
828:. London: Philip Wilson.
2640:Astronomical chronology
2613:Archaeology and geology
2320:Absolute space and time
2236:IERS Reference Meridian
2231:International Date Line
2142:International standards
2057:"At the centre of time"
1943:. Weinheim: Wiley-VCH.
1909:Interpretation Act 1978
1796:. AMANO. Archived from
1542:Bartky, Ian R. (2007).
1488:Oxford University Press
1326:Royal Museums Greenwich
1242:IERS Reference Meridian
889:Interpretation Act 1978
567:in the United Kingdom.
1907:(UK statute, see also
1050:
963:
958:
831:
711:Railway Clearing House
667:
518:
337:
2599:Weekday determination
2485:Sundial markup schema
1867:Howse, Derek (1997).
1484:UK English Dictionary
1361:The National Archives
1271:For explanation, see
1190:Western European Time
1155:Greenwich Time Signal
1040:
918:Greenwich Time Signal
900:British Standard Time
811:
657:
421:Eastern European Time
390:Central European Time
343:
226:Eastern European Time
205:Eastern European Time
178:Central European Time
133:Western European Time
112:Western European Time
99:
2620:Chronological dating
2360:Theory of relativity
2221:Daylight saving time
1898:. (Canadian statute)
1593:Liverpool Daily Post
885:Summer Time Act 1972
662:at the gates of the
650:History of longitude
620:bodies, such as the
345:Time zones of Africa
331: Dark colours:
32:GMT (disambiguation)
2830:Time value of money
2625:Geologic time scale
2480:History of sundials
2345:Cosmological decade
2297:Greenwich Mean Time
2128:Orders of magnitude
1856:McCarthy, Dennis D.
1830:2011Metro..48S.181G
1528:CLERK TO JUSTICES.
1507:, pp. 231â232.
1457:on 23 February 2022
1430:Greenwich Mean Time
1221:British Summer Time
999:British Summer Time
953:: "Standard Time" (
896:British Summer Time
660:Shepherd Gate Clock
522:Greenwich Mean Time
426:Egypt Standard Time
416:Central Africa Time
372:Greenwich Mean Time
162:Irish Standard Time
156:British Summer Time
138:Greenwich Mean Time
117:Greenwich Mean Time
42:Greenwich Mean Time
2856:1884 introductions
2805:Mental chronometry
2433:Marine chronometer
2285:Obsolete standards
2023:Irish Statute Book
1958:Myers, J. (2007).
1933:Irish Statute Book
1356:legislation.gov.uk
1238:Greenwich meridian
1234:originally defined
1161:Marine chronometer
1051:
874:GMT in legislation
824:Howse, D. (1997).
668:
584:Greenwich Meridian
519:
338:
2843:
2842:
2653:Nuclear timescale
2335:Continuous signal
2004:. 5 February 1999
1854:Hilton, James L;
1803:on 3 October 2008
799:William Markowitz
622:BBC World Service
534:Royal Observatory
517:
485:
484:
306:
305:
94:
93:
16:(Redirected from
2878:
2544:Dominical letter
2475:Equation of time
2438:Marine sandglass
2279:
2273:
2251:Terrestrial Time
2108:Time measurement
2101:
2094:
2087:
2078:
2077:
2073:
2071:
2069:
2032:
2021:
2013:
2011:
2009:
1998:"Six pip salute"
1993:
1991:
1980:
1970:
1968:
1966:
1954:
1930:
1928:
1926:
1906:
1894:
1882:
1863:
1849:
1812:
1810:
1808:
1802:
1795:
1785:
1783:
1781:
1776:on 20 April 2015
1755:
1754:
1742:
1736:
1735:
1728:
1719:
1718:
1711:
1702:
1696:
1690:
1687:
1678:
1672:
1666:
1665:
1648:
1642:
1641:
1639:
1637:
1622:
1616:
1615:
1607:
1601:
1600:
1588:
1582:
1576:
1567:
1566:
1564:
1562:
1539:
1533:
1526:
1520:
1514:
1508:
1502:
1496:
1495:
1494:on 14 June 2020.
1490:. Archived from
1473:
1467:
1466:
1464:
1462:
1447:
1441:
1440:
1438:
1436:
1422:
1416:
1410:
1401:
1400:
1394:
1392:
1378:
1372:
1371:
1370:
1368:
1347:
1338:
1337:
1335:
1333:
1318:
1312:
1311:
1309:
1307:
1293:
1276:
1269:
1263:
1260:
1254:
1251:
1245:
1240:but is now the "
1230:
1224:
1218:
966:
829:
745:Dublin Mean Time
612:
588:equation of time
576:elliptical orbit
572:angular velocity
554:one of the names
508:
492:
486:
449:East Africa Time
395:West Africa Time
350:
349:
336:
330:
327:
324:
319:
316:
313:
310:
297:
291:
285:
279:
262:
256:
212:
210:Kaliningrad Time
164:
158:
140:
119:
105:
104:
39:
38:
21:
2886:
2885:
2881:
2880:
2879:
2877:
2876:
2875:
2846:
2845:
2844:
2839:
2776:
2667:
2634:
2608:
2489:
2389:
2340:Coordinate time
2312:Time in physics
2306:
2280:
2274:
2265:
2137:
2114:
2105:
2067:
2065:
2041:
2036:
2033:(Irish statute)
2027:
2016:
2007:
2005:
1996:
1989:
1978:
1964:
1962:
1951:
1924:
1922:
1914:
1901:
1893:on 5 July 2009.
1885:
1879:
1824:(4): S181â185.
1806:
1804:
1800:
1793:
1779:
1777:
1768:
1764:
1759:
1758:
1743:
1739:
1730:
1729:
1722:
1713:
1712:
1705:
1697:
1693:
1688:
1681:
1673:
1669:
1662:
1650:
1649:
1645:
1635:
1633:
1624:
1623:
1619:
1608:
1604:
1590:
1589:
1585:
1577:
1570:
1560:
1558:
1556:
1540:
1536:
1527:
1523:
1515:
1511:
1503:
1499:
1475:
1474:
1470:
1460:
1458:
1449:
1448:
1444:
1434:
1432:
1424:
1423:
1419:
1411:
1404:
1390:
1388:
1380:
1379:
1375:
1366:
1364:
1349:
1348:
1341:
1331:
1329:
1320:
1319:
1315:
1305:
1303:
1295:
1294:
1290:
1285:
1280:
1279:
1270:
1266:
1261:
1257:
1252:
1248:
1231:
1227:
1219:
1215:
1210:
1139:
990:
959:Am CaighdeĂĄnach
938:
936:Other countries
881:
876:
836:
830:
823:
807:polar wandering
753:shortwave radio
735:in 1898 and in
721:local mean time
696:lunar distances
692:Nevil Maskelyne
676:maritime nation
652:
646:
610:
592:arithmetic mean
544:, counted from
530:local mean time
502:
493:The islands of
476:
472:Seychelles Time
435:
399:
357:Cape Verde Time
348:
328:
325:
322:
321:
317:
314:
311:
308:
307:
293:
287:
283:Azerbaijan Time
281:
275:
258:
252:
208:
160:
154:
136:
115:
35:
28:
23:
22:
15:
12:
11:
5:
2884:
2874:
2873:
2868:
2863:
2858:
2841:
2840:
2838:
2837:
2832:
2827:
2825:Time metrology
2822:
2817:
2812:
2807:
2802:
2801:
2800:
2790:
2784:
2782:
2781:Related topics
2778:
2777:
2775:
2774:
2769:
2764:
2759:
2754:
2749:
2744:
2739:
2734:
2729:
2724:
2719:
2714:
2709:
2704:
2699:
2694:
2689:
2684:
2678:
2676:
2669:
2668:
2666:
2665:
2660:
2655:
2650:
2644:
2642:
2636:
2635:
2633:
2632:
2627:
2622:
2616:
2614:
2610:
2609:
2607:
2606:
2601:
2596:
2591:
2586:
2581:
2576:
2571:
2566:
2561:
2556:
2551:
2546:
2541:
2536:
2531:
2526:
2520:
2515:
2510:
2505:
2499:
2497:
2491:
2490:
2488:
2487:
2482:
2477:
2472:
2470:Dialing scales
2467:
2462:
2457:
2456:
2455:
2445:
2440:
2435:
2430:
2425:
2420:
2415:
2410:
2405:
2399:
2397:
2391:
2390:
2388:
2387:
2382:
2377:
2372:
2367:
2362:
2357:
2352:
2347:
2342:
2337:
2332:
2327:
2322:
2316:
2314:
2308:
2307:
2305:
2304:
2302:Prime meridian
2299:
2294:
2292:Ephemeris time
2288:
2286:
2282:
2281:
2268:
2266:
2264:
2263:
2261:180th meridian
2258:
2253:
2248:
2243:
2238:
2233:
2228:
2223:
2218:
2213:
2208:
2203:
2198:
2193:
2188:
2183:
2178:
2173:
2168:
2163:
2158:
2157:
2156:
2145:
2143:
2139:
2138:
2136:
2135:
2130:
2125:
2119:
2116:
2115:
2104:
2103:
2096:
2089:
2081:
2075:
2074:
2052:
2047:
2040:
2039:External links
2037:
2035:
2034:
2025:
2014:
1994:
1971:
1955:
1949:
1936:
1912:
1899:
1883:
1877:
1864:
1851:
1813:
1786:
1765:
1763:
1760:
1757:
1756:
1737:
1720:
1703:
1691:
1679:
1677:, p. 157.
1667:
1660:
1643:
1617:
1602:
1583:
1568:
1555:978-0804756426
1554:
1534:
1521:
1519:, p. 114.
1509:
1497:
1468:
1442:
1417:
1402:
1373:
1339:
1313:
1287:
1286:
1284:
1281:
1278:
1277:
1264:
1255:
1246:
1225:
1212:
1211:
1209:
1206:
1205:
1204:
1199:
1193:
1187:
1182:
1179:Time in Europe
1176:
1170:
1164:
1158:
1152:
1146:
1138:
1135:
1134:
1133:
1128:
1123:
1118:
1113:
1105:
1100:
1095:
1090:
1085:
1080:
1075:
1070:
1065:
1060:
1035:
1034:
1029:
1027:Canary Islands
1024:
1014:
1007:
989:
986:
985:
984:
978:
968:
948:
937:
934:
880:
879:United Kingdom
877:
875:
872:
835:
832:
821:
777:Universal Time
672:United Kingdom
648:Main article:
645:
642:
618:United Kingdom
599:Universal Time
499:Canary Islands
483:
482:
475:
474:
469:
467:Mauritius Time
463:
461:
457:
456:
446:
442:
441:
434:
433:
428:
423:
418:
412:
410:
406:
405:
398:
397:
392:
386:
384:
380:
379:
369:
365:
364:
354:
304:
303:
273:
269:
268:
250:
246:
245:
234:
233:
223:
219:
218:
202:
198:
197:
186:
185:
175:
171:
170:
147:
146:
130:
126:
125:
109:
101:Time in Europe
92:
91:
87:
86:
82:Observance of
79:
78:
71:
70:
66:
65:
60:
56:
55:
51:
50:
44:
43:
26:
9:
6:
4:
3:
2:
2883:
2872:
2869:
2867:
2864:
2862:
2859:
2857:
2854:
2853:
2851:
2836:
2833:
2831:
2828:
2826:
2823:
2821:
2818:
2816:
2813:
2811:
2808:
2806:
2803:
2799:
2796:
2795:
2794:
2791:
2789:
2786:
2785:
2783:
2779:
2773:
2770:
2768:
2765:
2763:
2760:
2758:
2755:
2753:
2750:
2748:
2745:
2743:
2740:
2738:
2735:
2733:
2730:
2728:
2725:
2723:
2720:
2718:
2715:
2713:
2710:
2708:
2705:
2703:
2700:
2698:
2695:
2693:
2690:
2688:
2685:
2683:
2680:
2679:
2677:
2675:
2674:units of time
2670:
2664:
2663:Sidereal time
2661:
2659:
2656:
2654:
2651:
2649:
2648:Galactic year
2646:
2645:
2643:
2641:
2637:
2631:
2628:
2626:
2623:
2621:
2618:
2617:
2615:
2611:
2605:
2604:Weekday names
2602:
2600:
2597:
2595:
2594:Tropical year
2592:
2590:
2587:
2585:
2582:
2580:
2577:
2575:
2572:
2570:
2567:
2565:
2562:
2560:
2559:Intercalation
2557:
2555:
2552:
2550:
2547:
2545:
2542:
2540:
2537:
2535:
2532:
2530:
2527:
2525:(lunar Hijri)
2524:
2521:
2519:
2516:
2514:
2511:
2509:
2506:
2504:
2501:
2500:
2498:
2496:
2492:
2486:
2483:
2481:
2478:
2476:
2473:
2471:
2468:
2466:
2463:
2461:
2458:
2454:
2451:
2450:
2449:
2446:
2444:
2441:
2439:
2436:
2434:
2431:
2429:
2426:
2424:
2421:
2419:
2416:
2414:
2411:
2409:
2406:
2404:
2401:
2400:
2398:
2396:
2392:
2386:
2383:
2381:
2378:
2376:
2373:
2371:
2368:
2366:
2365:Time dilation
2363:
2361:
2358:
2356:
2353:
2351:
2348:
2346:
2343:
2341:
2338:
2336:
2333:
2331:
2328:
2326:
2323:
2321:
2318:
2317:
2315:
2313:
2309:
2303:
2300:
2298:
2295:
2293:
2290:
2289:
2287:
2283:
2278:
2272:
2262:
2259:
2257:
2254:
2252:
2249:
2247:
2244:
2242:
2239:
2237:
2234:
2232:
2229:
2227:
2224:
2222:
2219:
2217:
2214:
2212:
2209:
2207:
2204:
2202:
2201:24-hour clock
2199:
2197:
2196:12-hour clock
2194:
2192:
2189:
2187:
2184:
2182:
2179:
2177:
2174:
2172:
2169:
2167:
2164:
2162:
2159:
2155:
2152:
2151:
2150:
2147:
2146:
2144:
2140:
2134:
2131:
2129:
2126:
2124:
2121:
2120:
2117:
2113:
2109:
2102:
2097:
2095:
2090:
2088:
2083:
2082:
2079:
2064:
2063:
2058:
2053:
2051:
2048:
2046:
2043:
2042:
2030:
2026:
2024:
2019:
2015:
2003:
1999:
1995:
1988:
1984:
1977:
1972:
1961:
1956:
1952:
1950:9783527407804
1946:
1942:
1937:
1934:
1921:
1917:
1913:
1910:
1904:
1900:
1897:
1892:
1888:
1884:
1880:
1878:9780856674686
1874:
1870:
1865:
1861:
1857:
1852:
1847:
1843:
1839:
1835:
1831:
1827:
1823:
1819:
1814:
1799:
1792:
1787:
1775:
1771:
1767:
1766:
1752:
1748:
1741:
1733:
1727:
1725:
1716:
1710:
1708:
1700:
1695:
1686:
1684:
1676:
1671:
1663:
1661:0-935702-68-7
1657:
1653:
1647:
1631:
1627:
1621:
1613:
1606:
1599:
1594:
1587:
1580:
1575:
1573:
1557:
1551:
1547:
1546:
1538:
1531:
1525:
1518:
1513:
1506:
1501:
1493:
1489:
1485:
1483:
1478:
1472:
1456:
1452:
1446:
1431:
1427:
1421:
1415:, p. 17.
1414:
1409:
1407:
1399:
1387:
1383:
1377:
1362:
1358:
1357:
1352:
1346:
1344:
1327:
1323:
1317:
1302:
1298:
1297:"Time scales"
1292:
1288:
1274:
1268:
1259:
1250:
1243:
1239:
1236:as being the
1235:
1229:
1222:
1217:
1213:
1203:
1200:
1197:
1194:
1191:
1188:
1186:
1183:
1180:
1177:
1174:
1171:
1168:
1165:
1162:
1159:
1156:
1153:
1150:
1147:
1144:
1143:Ruth Belville
1141:
1140:
1132:
1129:
1127:
1124:
1122:
1119:
1117:
1114:
1112:
1109:
1106:
1104:
1101:
1099:
1096:
1094:
1091:
1089:
1086:
1084:
1081:
1079:
1078:Guinea-Bissau
1076:
1074:
1071:
1069:
1066:
1064:
1061:
1059:
1056:
1055:
1054:
1048:
1044:
1039:
1033:
1032:Faroe Islands
1030:
1028:
1025:
1022:
1018:
1015:
1012:
1008:
1005:
1001:
1000:
995:
994:
993:
982:
979:
976:
972:
969:
965:
960:
956:
952:
949:
946:
943:
942:
941:
933:
931:
927:
923:
919:
914:
912:
907:
905:
901:
897:
892:
890:
886:
871:
869:
865:
861:
857:
853:
849:
845:
841:
827:
820:
817:
810:
808:
804:
800:
796:
792:
788:
787:universal day
784:
782:
778:
773:
769:
768:atomic clocks
765:
760:
758:
754:
750:
746:
742:
738:
734:
730:
726:
722:
718:
717:
712:
708:
707:Great Britain
703:
701:
697:
694:'s method of
693:
689:
685:
681:
677:
673:
665:
661:
656:
651:
641:
639:
635:
631:
627:
623:
619:
614:
608:
604:
600:
595:
593:
589:
585:
581:
577:
573:
568:
566:
562:
559:
555:
551:
547:
543:
539:
535:
531:
527:
523:
515:
511:
507:
506:
500:
496:
491:
490:
480:
473:
470:
468:
465:
464:
462:
459:
458:
454:
450:
447:
444:
443:
439:
432:
429:
427:
424:
422:
419:
417:
414:
413:
411:
408:
407:
403:
396:
393:
391:
388:
387:
385:
382:
381:
377:
373:
370:
367:
366:
362:
358:
355:
352:
351:
346:
342:
334:
301:
296:
290:
284:
278:
274:
271:
270:
266:
261:
255:
251:
248:
247:
243:
239:
236:
235:
231:
227:
224:
220:
216:
211:
206:
203:
200:
199:
195:
191:
188:
187:
183:
179:
176:
172:
168:
163:
157:
152:
149:
148:
144:
139:
134:
131:
127:
123:
118:
113:
110:
107:
106:
102:
98:
88:
85:
80:
77:
72:
67:
64:
61:
57:
52:
49:
45:
40:
37:
33:
19:
2810:Decimal time
2539:Astronomical
2418:Complication
2413:Atomic clock
2296:
2066:. Retrieved
2060:
2006:. Retrieved
2001:
1982:
1963:. Retrieved
1940:
1923:. Retrieved
1919:
1891:the original
1868:
1859:
1821:
1817:
1805:. Retrieved
1798:the original
1778:. Retrieved
1774:the original
1750:
1740:
1694:
1670:
1651:
1646:
1634:. Retrieved
1620:
1611:
1605:
1596:
1592:
1586:
1559:. Retrieved
1544:
1537:
1524:
1512:
1500:
1492:the original
1480:
1471:
1459:. Retrieved
1455:the original
1445:
1433:. Retrieved
1429:
1420:
1396:
1389:. Retrieved
1385:
1376:
1365:, retrieved
1354:
1330:. Retrieved
1316:
1304:. Retrieved
1300:
1291:
1267:
1258:
1249:
1228:
1216:
1126:Sierra Leone
1058:Burkina Faso
1052:
1049:, set to GMT
1010:
1003:
997:
991:
964:Am Geimhridh
939:
929:
925:
915:
908:
903:
899:
893:
882:
867:
863:
859:
855:
851:
848:Roman Empire
837:
825:
812:
802:
780:
776:
761:
749:time signals
731:in 1883, in
724:
716:railway time
714:
704:
669:
615:
596:
569:
525:
521:
520:
505:
489:
371:
344:
289:Georgia Time
277:Armenia Time
137:
116:
75:
69:Current time
36:
2820:System time
2815:Metric time
2534:Solar Hijri
2460:Water clock
2443:Radio clock
2375:Time domain
2355:Proper time
2241:Leap second
2123:Chronometry
1965:2 September
1751:www.acts.ie
1461:27 February
1391:13 December
1167:Radio clock
1088:Ivory Coast
1011:Winter Time
981:Philippines
975:Nova Scotia
913:in summer.
898:was called
729:Isle of Man
680:chronometer
353:Light Blue
333:Summer time
295:Samara Time
260:Turkey Time
254:Moscow Time
2871:Time zones
2850:Categories
2835:Timekeeper
2788:Chronology
2772:Millennium
2658:Precession
2564:Julian day
2385:T-symmetry
2246:Solar time
2216:Civil time
2068:20 October
1818:Metrologia
1675:Howse 1997
1579:Myers 2007
1517:Howse 1997
1367:30 October
1332:28 October
1283:References
1111:(disputed)
1103:Mauritania
1063:The Gambia
868:zero hours
844:Julian day
700:time zones
630:Met Office
628:, and the
626:Royal Navy
580:axial tilt
565:civil time
514:Seychelles
495:Cape Verde
460:Turquoise
108:Light Blue
54:UTC offset
2732:Fortnight
2579:Lunisolar
2569:Leap year
2503:Gregorian
2453:stopwatch
2428:Hourglass
2408:Astrarium
2325:Spacetime
2256:Time zone
2133:Metrology
2112:standards
1925:2 January
1846:121852011
1561:18 August
1202:Zulu Time
1041:Clock in
988:Time zone
911:UTC+01:00
757:time ball
747:. Hourly
739:in 1913.
725:The Times
684:longitude
561:UTC+00:00
558:time zone
538:Greenwich
528:) is the
510:Mauritius
272:Turquoise
63:UTC±00:00
48:Time zone
2793:Duration
2767:Saeculum
2747:Olympiad
2589:Solstice
2518:Holocene
2495:Calendar
2395:Horology
2186:ISO 8601
2181:ISO 31-1
2062:BBC News
2002:BBC News
1987:Archived
1630:Archived
1301:UCO Lick
1137:See also
1017:Portugal
822:â
737:Guernsey
578:and its
556:for the
546:midnight
512:and the
335:observed
2762:Century
2752:Lustrum
2682:Instant
2554:Equinox
2523:Islamic
2465:Sundial
2330:Chronon
1826:Bibcode
1762:Sources
1306:28 July
1121:Senegal
1093:Liberia
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