Knowledge

Ordinal date

Source 📝

124: 25: 1165: 249: 447:
The formula reflects the fact that any five consecutive months in the range March–January have a total length of 153 days, due to a fixed pattern 31–30–31–30–31 repeating itself twice. This is similar to encoding of the month offset (which would be the same sequence modulo 7) in Zeller's
2015: 1832: 1652: 1363: 1132: 874: 803: 1903: 1723: 1543: 670: 1275: 1410: 227:, which still seen in old programming languages and spreadsheet software. The older names are deprecated because they are easily confused with the earlier dating system called ' 1454: 717: 749: 596: 622: 1477: 1909: 1729: 1549: 556:, where 306 is the number of dates in March through December. This makes use of the fact that the formula correctly gives a month-length of 31 for January. 1281: 127: 54: 1065: 822: 196:
format. The year may sometimes be omitted, if it is implied by the context; the day may be generalized from integers to include a
757: 1852: 123: 1672: 1492: 630: 340:
The most trivial method of calculating the ordinal day involves counting up all days that have elapsed per the definition:
1227: 1208: 292: 76: 1190: 274: 47: 310: 305:
Computation of the ordinal day within a year is part of calculating the ordinal day throughout the years from a
1175: 259: 1371: 393:
The table of month lengths can be replaced following the method of encoding the month-length variation in
235:, which was in prior use and which remains ubiquitous in astronomical and some historical calculations. 131: 92: 37: 3072: 41: 33: 1186: 270: 1415: 3016: 394: 306: 58: 687: 722: 572: 8: 601: 464:
is 30.6, the sequence oscillates in the desired pattern with the desired period 5.
2010:{\displaystyle d={\bmod {\!}}\!(300,30)+2-\left\lfloor 0.6(11+1)\right\rfloor =0+2-7=-5} 1827:{\displaystyle d={\bmod {\!}}\!(200,30)+3-\left\lfloor 0.6(7+1)\right\rfloor =20+3-4=19} 1647:{\displaystyle d={\bmod {\!}}\!(100,30)+3-\left\lfloor 0.6(4+1)\right\rfloor =10+3-3=10} 1459: 3067: 1182: 266: 170:, ranging between 1 and 366 (starting on January 1), representing the multiples of a 3041: 332:, for the year, month, and day numbers of the Gregorian or Julian calendar date. 193: 192:). The two parts of the date can be formatted as "YYYY-DDD" to comply with the 166: 3061: 3021: 1358:{\displaystyle d={\bmod {\!}}\!(od,30)+i-\left\lfloor 0.6(m+1)\right\rfloor } 563: 155: 385:
Similarly trivial is the use of a lookup table, such as the one referenced.
467:
To go from the March 1 based ordinal day to a January 1 based ordinal day:
197: 503:
is a function returning 0 or 1 depending whether the input is a leap year.
316:
In the following text, several algorithms for calculating the ordinal day
214: 3011: 228: 1148: 313:, though for this purpose modulo 7 simplifications can be made. 1193:. Statements consisting only of original research should be removed. 277:. Statements consisting only of original research should be removed. 682:
3, 4, 5, and 6, i.e., between 4/4, 6/6, 8/8, 10/10, and 12/12.
1920: 1740: 1560: 1376: 1292: 1127:{\displaystyle 30(m-1)+\left\lfloor 0.6(m+1)\right\rfloor -i} 869:{\displaystyle O=\left\lfloor 63.2n-56+119-0.4\right\rfloor } 160: 370:, taking care of leap year according to the calendar used. 798:{\displaystyle O=\left\lfloor 63.2n-56+0.2\right\rfloor } 172: 3042:"Table of ordinal day number for various calendar dates" 1898:{\displaystyle m=\left\lfloor 300/30\right\rfloor +1=11} 675:
giving consecutive differences of 63 (9 weeks) for
1718:{\displaystyle m=\left\lfloor 200/30\right\rfloor +1=7} 1538:{\displaystyle m=\left\lfloor 100/30\right\rfloor +1=4} 665:{\displaystyle O=\left\lfloor 63.2n-91.4\right\rfloor } 427:. As a result, the March 1-based ordinal day number is 211:
is the preferred name for what was formerly called the
415:. It can be shown (see below) that for a month-number 1912: 1855: 1732: 1675: 1552: 1495: 1462: 1418: 1374: 1284: 1230: 1068: 825: 760: 725: 690: 633: 604: 575: 419:, the total days of the preceding months is equal to 1270:{\displaystyle m=\left\lfloor od/30\right\rfloor +1} 506:For January and February, two methods can be used: 2009: 1897: 1826: 1717: 1646: 1537: 1471: 1448: 1404: 1357: 1269: 1126: 868: 797: 743: 711: 664: 616: 590: 1927: 1924: 1747: 1744: 1567: 1564: 1383: 1380: 1299: 1296: 509:The trivial method is to skip the calculation of 3059: 46:but its sources remain unclear because it lacks 886:(difference between 5/9 and 9/5), and also for 879:giving a difference of 119 (17 weeks) for 309:, such as the Julian date. It is also part of 134:with ordinal date (without year) prepended, on 1221:The number of the month and date is given by 1139:For example, the ordinal date of April 15 is 320:are presented. The inputs taken are integers 2025: 1209:Learn how and when to remove this message 293:Learn how and when to remove this message 77:Learn how and when to remove this message 122: 3060: 1405:{\displaystyle {\bmod {\!}}\!(od,30)} 1158: 893:(difference between 7/11 and 11/7). 542:The less redundant method is to use 242: 130:'s board with time data, displaying 18: 2021:November - 5 = October 26 (31 - 5). 13: 335: 200:representing a fraction of a day. 14: 3084: 2995: 1163: 247: 97:expressed according to ISO 8601 23: 311:calculating the day of the week 203: 3034: 1972: 1960: 1940: 1928: 1792: 1780: 1760: 1748: 1612: 1600: 1580: 1568: 1443: 1431: 1399: 1384: 1347: 1335: 1315: 1300: 1110: 1098: 1084: 1072: 388: 238: 1: 3027: 1154: 7: 3005: 1189:the claims made and adding 273:the claims made and adding 10: 3089: 1449:{\displaystyle od-30(m-1)} 1062: 478:(March through December), 362:, add the length of month 158:typically consisting of a 2123: 2110: 2095: 2087: 2077: 2067: 2052: 1663:Day 200 of a common year: 1483:Day 100 of a common year: 113: 103: 1412:can also be replaced by 896: 32:This article includes a 2026:Helper conversion table 1843:Day 300 of a leap year: 439:− 3) + 2) / 5⌋ + 61:more precise citations. 2011: 1899: 1828: 1719: 1648: 1539: 1473: 1450: 1406: 1359: 1271: 1143:in a common year, and 1128: 870: 799: 745: 713: 712:{\displaystyle m=2n+1} 666: 618: 592: 147: 128:Mission control center 16:Date written as number 2012: 1900: 1829: 1720: 1649: 1540: 1474: 1451: 1407: 1360: 1272: 1129: 871: 800: 746: 744:{\displaystyle d=m+4} 714: 667: 619: 593: 194:ISO 8601 ordinal date 126: 1910: 1853: 1730: 1673: 1550: 1493: 1460: 1416: 1372: 1282: 1228: 1066: 823: 758: 723: 688: 631: 602: 591:{\displaystyle m=2n} 573: 518:and go straight for 425:− 3) + 2) / 5⌋ 397:. As in Zeller, the 3017:Zeller's congruence 617:{\displaystyle d=m} 395:Zeller's congruence 100: 2007: 1895: 1824: 1715: 1644: 1535: 1479:the ordinal date. 1472:{\displaystyle od} 1469: 1446: 1402: 1355: 1267: 1174:possibly contains 1124: 866: 795: 741: 709: 662: 614: 588: 258:possibly contains 182:ordinal day number 148: 142:October 2013 (i.e. 89: 34:list of references 3003: 3002: 2774: 2773: 2513: 2512: 2255: 2254: 1219: 1218: 1211: 1176:original research 1137: 1136: 303: 302: 295: 260:original research 121: 120: 99: 87: 86: 79: 3080: 3052: 3051: 3049: 3048: 3038: 2950: 2944: 2929: 2923: 2907: 2870: 2864: 2849: 2843: 2827: 2776: 2775: 2769: 2763: 2748: 2742: 2726: 2689: 2683: 2668: 2662: 2646: 2609: 2603: 2588: 2582: 2566: 2515: 2514: 2508: 2502: 2487: 2481: 2465: 2428: 2422: 2407: 2401: 2385: 2348: 2330: 2324: 2308: 2257: 2256: 2250: 2232: 2226: 2210: 2158: 2152: 2136: 2113: 2098: 2055: 2030: 2029: 2016: 2014: 2013: 2008: 1979: 1975: 1926: 1925: 1904: 1902: 1901: 1896: 1882: 1878: 1874: 1833: 1831: 1830: 1825: 1799: 1795: 1746: 1745: 1724: 1722: 1721: 1716: 1702: 1698: 1694: 1653: 1651: 1650: 1645: 1619: 1615: 1566: 1565: 1544: 1542: 1541: 1536: 1522: 1518: 1514: 1478: 1476: 1475: 1470: 1455: 1453: 1452: 1447: 1411: 1409: 1408: 1403: 1382: 1381: 1364: 1362: 1361: 1356: 1354: 1350: 1298: 1297: 1276: 1274: 1273: 1268: 1260: 1256: 1252: 1214: 1207: 1203: 1200: 1194: 1191:inline citations 1167: 1166: 1159: 1146: 1142: 1133: 1131: 1130: 1125: 1117: 1113: 901: 900: 892: 890: 885: 883: 875: 873: 872: 867: 865: 861: 804: 802: 801: 796: 794: 790: 750: 748: 747: 742: 718: 716: 715: 710: 681: 679: 671: 669: 668: 663: 661: 657: 623: 621: 620: 615: 597: 595: 594: 589: 555: 538: 528:for January and 527: 517: 502: 498: 496: 477: 463: 461: 460: 457: 454: 443: 426: 418: 414: 407: 400: 365: 361: 331: 327: 323: 319: 298: 291: 287: 284: 278: 275:inline citations 251: 250: 243: 234: 226: 222: 145: 141: 137: 109: 101: 98: 96: 88: 82: 75: 71: 68: 62: 57:this article by 48:inline citations 27: 26: 19: 3088: 3087: 3083: 3082: 3081: 3079: 3078: 3077: 3073:Ordinal numbers 3058: 3057: 3056: 3055: 3046: 3044: 3040: 3039: 3035: 3030: 3008: 2948: 2942: 2927: 2921: 2905: 2868: 2862: 2847: 2841: 2825: 2790: 2785: 2780: 2767: 2761: 2746: 2740: 2724: 2687: 2681: 2666: 2660: 2644: 2607: 2601: 2586: 2580: 2564: 2529: 2524: 2519: 2506: 2500: 2485: 2479: 2463: 2426: 2420: 2405: 2399: 2383: 2346: 2328: 2322: 2306: 2271: 2266: 2261: 2248: 2230: 2224: 2208: 2156: 2150: 2134: 2111: 2096: 2053: 2044: 2039: 2034: 2028: 1956: 1952: 1923: 1919: 1911: 1908: 1907: 1870: 1866: 1862: 1854: 1851: 1850: 1776: 1772: 1743: 1739: 1731: 1728: 1727: 1690: 1686: 1682: 1674: 1671: 1670: 1596: 1592: 1563: 1559: 1551: 1548: 1547: 1510: 1506: 1502: 1494: 1491: 1490: 1461: 1458: 1457: 1417: 1414: 1413: 1379: 1375: 1373: 1370: 1369: 1331: 1327: 1295: 1291: 1283: 1280: 1279: 1248: 1241: 1237: 1229: 1226: 1225: 1215: 1204: 1198: 1195: 1180: 1168: 1164: 1157: 1144: 1140: 1094: 1090: 1067: 1064: 1063: 963: 958: 953: 948: 943: 938: 933: 928: 923: 918: 913: 908: 899: 888: 887: 881: 880: 836: 832: 824: 821: 820: 771: 767: 759: 756: 755: 724: 721: 720: 689: 686: 685: 677: 676: 644: 640: 632: 629: 628: 603: 600: 599: 574: 571: 570: 553: 543: 529: 519: 516: 510: 500: 490: 480: 479: 472: 458: 455: 452: 451: 449: 448:congruence. As 434: 428: 420: 416: 409: 402: 398: 391: 363: 352: 338: 336:Trivial methods 329: 325: 321: 317: 299: 288: 282: 279: 264: 252: 248: 241: 232: 224: 220: 206: 184:(also known as 178:day of the year 143: 139: 135: 107: 90: 83: 72: 66: 63: 52: 38:related reading 28: 24: 17: 12: 11: 5: 3086: 3076: 3075: 3070: 3054: 3053: 3032: 3031: 3029: 3026: 3025: 3024: 3019: 3014: 3007: 3004: 3001: 3000: 2997: 2994: 2990: 2989: 2986: 2983: 2979: 2978: 2975: 2972: 2966: 2965: 2962: 2959: 2953: 2952: 2946: 2940: 2934: 2933: 2925: 2919: 2915: 2914: 2911: 2903: 2899: 2898: 2895: 2892: 2886: 2885: 2882: 2879: 2873: 2872: 2866: 2860: 2854: 2853: 2845: 2839: 2835: 2834: 2831: 2823: 2819: 2818: 2815: 2812: 2806: 2805: 2802: 2799: 2793: 2792: 2787: 2782: 2772: 2771: 2765: 2759: 2753: 2752: 2744: 2738: 2734: 2733: 2730: 2722: 2718: 2717: 2714: 2711: 2705: 2704: 2701: 2698: 2692: 2691: 2685: 2679: 2673: 2672: 2664: 2658: 2654: 2653: 2650: 2642: 2638: 2637: 2634: 2631: 2625: 2624: 2621: 2618: 2612: 2611: 2605: 2599: 2593: 2592: 2584: 2578: 2574: 2573: 2570: 2562: 2558: 2557: 2554: 2551: 2545: 2544: 2541: 2538: 2532: 2531: 2526: 2521: 2511: 2510: 2504: 2498: 2492: 2491: 2483: 2477: 2473: 2472: 2469: 2461: 2457: 2456: 2453: 2450: 2444: 2443: 2440: 2437: 2431: 2430: 2424: 2418: 2412: 2411: 2403: 2397: 2393: 2392: 2389: 2381: 2377: 2376: 2373: 2370: 2364: 2363: 2360: 2357: 2351: 2350: 2344: 2341: 2335: 2334: 2326: 2320: 2316: 2315: 2312: 2304: 2300: 2299: 2296: 2293: 2287: 2286: 2283: 2280: 2274: 2273: 2268: 2263: 2253: 2252: 2246: 2243: 2237: 2236: 2228: 2222: 2218: 2217: 2214: 2206: 2202: 2201: 2198: 2195: 2189: 2188: 2185: 2182: 2176: 2175: 2172: 2169: 2163: 2162: 2154: 2148: 2144: 2143: 2140: 2132: 2126: 2125: 2122: 2116: 2115: 2109: 2103: 2102: 2094: 2090: 2089: 2086: 2080: 2079: 2076: 2070: 2069: 2066: 2060: 2059: 2051: 2047: 2046: 2041: 2036: 2027: 2024: 2023: 2022: 2019: 2018: 2017: 2006: 2003: 2000: 1997: 1994: 1991: 1988: 1985: 1982: 1978: 1974: 1971: 1968: 1965: 1962: 1959: 1955: 1951: 1948: 1945: 1942: 1939: 1936: 1933: 1930: 1922: 1918: 1915: 1905: 1894: 1891: 1888: 1885: 1881: 1877: 1873: 1869: 1865: 1861: 1858: 1845: 1844: 1840: 1839: 1836: 1835: 1834: 1823: 1820: 1817: 1814: 1811: 1808: 1805: 1802: 1798: 1794: 1791: 1788: 1785: 1782: 1779: 1775: 1771: 1768: 1765: 1762: 1759: 1756: 1753: 1750: 1742: 1738: 1735: 1725: 1714: 1711: 1708: 1705: 1701: 1697: 1693: 1689: 1685: 1681: 1678: 1665: 1664: 1660: 1659: 1656: 1655: 1654: 1643: 1640: 1637: 1634: 1631: 1628: 1625: 1622: 1618: 1614: 1611: 1608: 1605: 1602: 1599: 1595: 1591: 1588: 1585: 1582: 1579: 1576: 1573: 1570: 1562: 1558: 1555: 1545: 1534: 1531: 1528: 1525: 1521: 1517: 1513: 1509: 1505: 1501: 1498: 1485: 1484: 1468: 1465: 1445: 1442: 1439: 1436: 1433: 1430: 1427: 1424: 1421: 1401: 1398: 1395: 1392: 1389: 1386: 1378: 1366: 1365: 1353: 1349: 1346: 1343: 1340: 1337: 1334: 1330: 1326: 1323: 1320: 1317: 1314: 1311: 1308: 1305: 1302: 1294: 1290: 1287: 1277: 1266: 1263: 1259: 1255: 1251: 1247: 1244: 1240: 1236: 1233: 1217: 1216: 1171: 1169: 1162: 1156: 1153: 1135: 1134: 1123: 1120: 1116: 1112: 1109: 1106: 1103: 1100: 1097: 1093: 1089: 1086: 1083: 1080: 1077: 1074: 1071: 1061: 1057: 1056: 1053: 1050: 1047: 1044: 1041: 1038: 1035: 1032: 1029: 1026: 1023: 1020: 1017: 1013: 1012: 1009: 1006: 1003: 1000: 997: 994: 991: 988: 985: 982: 979: 976: 973: 969: 968: 965: 960: 955: 950: 945: 940: 935: 930: 925: 920: 915: 910: 905: 904:To the day of 898: 895: 877: 876: 864: 860: 857: 854: 851: 848: 845: 842: 839: 835: 831: 828: 806: 805: 793: 789: 786: 783: 780: 777: 774: 770: 766: 763: 740: 737: 734: 731: 728: 708: 705: 702: 699: 696: 693: 673: 672: 660: 656: 653: 650: 647: 643: 639: 636: 613: 610: 607: 587: 584: 581: 578: 566:" properties: 560: 559: 558: 557: 551: 540: 514: 504: 491:+ 59 + isLeap( 488: 432: 401:is changed to 390: 387: 383: 382: 371: 349: 337: 334: 307:reference date 301: 300: 256:This section 255: 253: 246: 240: 237: 205: 202: 167:ordinal number 132:universal time 119: 118: 115: 111: 110: 105: 91:Today's date ( 85: 84: 42:external links 31: 29: 22: 15: 9: 6: 4: 3: 2: 3085: 3074: 3071: 3069: 3066: 3065: 3063: 3043: 3037: 3033: 3023: 3022:ISO week date 3020: 3018: 3015: 3013: 3010: 3009: 2998: 2992: 2991: 2987: 2984: 2981: 2980: 2976: 2973: 2971: 2968: 2967: 2963: 2960: 2958: 2955: 2954: 2947: 2941: 2939: 2936: 2935: 2932: 2926: 2920: 2917: 2916: 2912: 2910: 2904: 2901: 2900: 2896: 2893: 2891: 2888: 2887: 2883: 2880: 2878: 2875: 2874: 2867: 2861: 2859: 2856: 2855: 2852: 2846: 2840: 2837: 2836: 2832: 2830: 2824: 2821: 2820: 2816: 2813: 2811: 2808: 2807: 2803: 2800: 2798: 2795: 2794: 2788: 2783: 2778: 2777: 2766: 2760: 2758: 2755: 2754: 2751: 2745: 2739: 2736: 2735: 2731: 2729: 2723: 2720: 2719: 2715: 2712: 2710: 2707: 2706: 2702: 2699: 2697: 2694: 2693: 2686: 2680: 2678: 2675: 2674: 2671: 2665: 2659: 2656: 2655: 2651: 2649: 2643: 2640: 2639: 2635: 2632: 2630: 2627: 2626: 2622: 2619: 2617: 2614: 2613: 2606: 2600: 2598: 2595: 2594: 2591: 2585: 2579: 2576: 2575: 2571: 2569: 2563: 2560: 2559: 2555: 2552: 2550: 2547: 2546: 2542: 2539: 2537: 2534: 2533: 2527: 2522: 2517: 2516: 2505: 2499: 2497: 2494: 2493: 2490: 2484: 2478: 2475: 2474: 2470: 2468: 2462: 2459: 2458: 2454: 2451: 2449: 2446: 2445: 2441: 2438: 2436: 2433: 2432: 2425: 2419: 2417: 2414: 2413: 2410: 2404: 2398: 2395: 2394: 2390: 2388: 2382: 2379: 2378: 2374: 2371: 2369: 2366: 2365: 2361: 2358: 2356: 2353: 2352: 2345: 2342: 2340: 2337: 2336: 2333: 2327: 2321: 2318: 2317: 2313: 2311: 2305: 2302: 2301: 2297: 2294: 2292: 2289: 2288: 2284: 2281: 2279: 2276: 2275: 2269: 2264: 2259: 2258: 2247: 2244: 2242: 2239: 2238: 2235: 2229: 2223: 2220: 2219: 2215: 2213: 2207: 2204: 2203: 2199: 2196: 2194: 2191: 2190: 2186: 2183: 2181: 2178: 2177: 2173: 2170: 2168: 2165: 2164: 2161: 2155: 2149: 2146: 2145: 2141: 2139: 2133: 2131: 2128: 2127: 2121: 2118: 2117: 2108: 2105: 2104: 2101: 2092: 2091: 2085: 2082: 2081: 2075: 2072: 2071: 2065: 2062: 2061: 2058: 2049: 2048: 2042: 2037: 2032: 2031: 2020: 2004: 2001: 1998: 1995: 1992: 1989: 1986: 1983: 1980: 1976: 1969: 1966: 1963: 1957: 1953: 1949: 1946: 1943: 1937: 1934: 1931: 1916: 1913: 1906: 1892: 1889: 1886: 1883: 1879: 1875: 1871: 1867: 1863: 1859: 1856: 1849: 1848: 1847: 1846: 1842: 1841: 1837: 1821: 1818: 1815: 1812: 1809: 1806: 1803: 1800: 1796: 1789: 1786: 1783: 1777: 1773: 1769: 1766: 1763: 1757: 1754: 1751: 1736: 1733: 1726: 1712: 1709: 1706: 1703: 1699: 1695: 1691: 1687: 1683: 1679: 1676: 1669: 1668: 1667: 1666: 1662: 1661: 1657: 1641: 1638: 1635: 1632: 1629: 1626: 1623: 1620: 1616: 1609: 1606: 1603: 1597: 1593: 1589: 1586: 1583: 1577: 1574: 1571: 1556: 1553: 1546: 1532: 1529: 1526: 1523: 1519: 1515: 1511: 1507: 1503: 1499: 1496: 1489: 1488: 1487: 1486: 1482: 1481: 1480: 1466: 1463: 1440: 1437: 1434: 1428: 1425: 1422: 1419: 1396: 1393: 1390: 1387: 1351: 1344: 1341: 1338: 1332: 1328: 1324: 1321: 1318: 1312: 1309: 1306: 1303: 1288: 1285: 1278: 1264: 1261: 1257: 1253: 1249: 1245: 1242: 1238: 1234: 1231: 1224: 1223: 1222: 1213: 1210: 1202: 1192: 1188: 1184: 1178: 1177: 1172:This section 1170: 1161: 1160: 1152: 1150: 1145:91 + 15 = 106 1141:90 + 15 = 105 1121: 1118: 1114: 1107: 1104: 1101: 1095: 1091: 1087: 1081: 1078: 1075: 1069: 1059: 1058: 1054: 1051: 1048: 1045: 1042: 1039: 1036: 1033: 1030: 1027: 1024: 1021: 1018: 1015: 1014: 1010: 1007: 1004: 1001: 998: 995: 992: 989: 986: 983: 980: 977: 974: 971: 970: 966: 961: 956: 951: 946: 941: 936: 931: 926: 921: 916: 911: 906: 903: 902: 894: 862: 858: 855: 852: 849: 846: 843: 840: 837: 833: 829: 826: 819: 818: 817: 816:interchanged 815: 811: 791: 787: 784: 781: 778: 775: 772: 768: 764: 761: 754: 753: 752: 738: 735: 732: 729: 726: 706: 703: 700: 697: 694: 691: 683: 658: 654: 651: 648: 645: 641: 637: 634: 627: 626: 625: 611: 608: 605: 585: 582: 579: 576: 567: 565: 550: 546: 541: 539:for February. 536: 532: 526: 522: 513: 508: 507: 505: 494: 487: 483: 475: 470: 469: 468: 465: 445: 442: 438: 431: 424: 412: 405: 396: 386: 380: 376: 372: 369: 359: 355: 350: 347: 343: 342: 341: 333: 314: 312: 308: 297: 294: 286: 276: 272: 268: 262: 261: 254: 245: 244: 236: 230: 218: 216: 210: 201: 199: 195: 191: 187: 183: 179: 175: 174: 169: 168: 163: 162: 157: 156:calendar date 153: 133: 129: 125: 116: 112: 106: 102: 94: 81: 78: 70: 60: 56: 50: 49: 43: 39: 35: 30: 21: 20: 3045:. Retrieved 3036: 2969: 2956: 2937: 2930: 2908: 2889: 2876: 2857: 2850: 2828: 2809: 2796: 2756: 2749: 2727: 2708: 2695: 2676: 2669: 2647: 2628: 2615: 2596: 2589: 2567: 2548: 2535: 2495: 2488: 2466: 2447: 2434: 2415: 2408: 2386: 2367: 2354: 2338: 2331: 2309: 2290: 2277: 2240: 2233: 2211: 2192: 2179: 2166: 2159: 2137: 2129: 2119: 2106: 2099: 2083: 2073: 2063: 2056: 1367: 1220: 1205: 1196: 1173: 1138: 878: 813: 809: 807: 684: 674: 568: 561: 548: 544: 534: 530: 524: 520: 511: 492: 485: 481: 473: 466: 446: 440: 436: 429: 422: 410: 403: 392: 384: 378: 374: 367: 357: 353: 345: 339: 315: 304: 289: 280: 257: 212: 209:Ordinal date 208: 207: 204:Nomenclature 198:decimal part 189: 185: 181: 177: 171: 165: 159: 152:ordinal date 151: 149: 114:Ordinal date 73: 64: 53:Please help 45: 1199:August 2019 1016:Leap years 554:− 306 435:= ⌊(153 × ( 389:Zeller-like 283:August 2019 239:Calculation 231:number' or 215:Julian date 186:ordinal day 59:introducing 3062:Categories 3047:2021-04-08 3028:References 3012:Julian day 1183:improve it 1060:Algorithm 476:≤ 12 267:improve it 229:Julian day 190:day number 108:2024-09-21 3068:Calendars 2002:− 1993:− 1950:− 1813:− 1770:− 1658:April 10. 1633:− 1590:− 1438:− 1426:− 1368:the term 1325:− 1187:verifying 1155:Month–day 1149:leap year 1119:− 1079:− 856:− 844:− 808:and with 779:− 652:− 421:⌊(153 * ( 413:≤ 2 271:verifying 176:, called 146:2013-295) 67:July 2019 3006:See also 1977:⌋ 1954:⌊ 1880:⌋ 1864:⌊ 1838:July 19. 1797:⌋ 1774:⌊ 1700:⌋ 1684:⌊ 1617:⌋ 1594:⌊ 1520:⌋ 1504:⌊ 1352:⌋ 1329:⌊ 1258:⌋ 1239:⌊ 1115:⌋ 1092:⌊ 863:⌋ 834:⌊ 792:⌋ 769:⌊ 659:⌋ 642:⌊ 564:Doomsday 117:2024-265 2999:31 Dec 2988:30 Dec 2977:25 Dec 2964:15 Dec 2913:30 Nov 2897:25 Nov 2884:15 Nov 2833:31 Oct 2817:26 Oct 2804:16 Oct 2732:30 Sep 2716:26 Sep 2703:16 Sep 2652:31 Aug 2636:27 Aug 2623:17 Aug 2572:31 Jul 2556:28 Jul 2543:18 Jul 2471:30 Jun 2455:28 Jun 2442:18 Jun 2391:31 May 2375:29 May 2362:19 May 2314:30 Apr 2298:29 Apr 2285:19 Apr 2216:31 Mar 2200:30 Mar 2187:20 Mar 2174:10 Mar 2142:29 Feb 2124:19 Feb 2088:30 Jan 2078:20 Jan 2068:10 Jan 2038:common 1181:Please 462:⁠ 450:⁠ 356:= 1 .. 265:Please 164:and an 55:improve 2985:31 Dec 2974:26 Dec 2961:16 Dec 2951:5 Dec 2894:26 Nov 2881:16 Nov 2871:5 Nov 2814:27 Oct 2801:17 Oct 2784:comm. 2770:6 Oct 2713:27 Sep 2700:17 Sep 2690:6 Sep 2633:28 Aug 2620:18 Aug 2610:7 Aug 2553:29 Jul 2540:19 Jul 2523:comm. 2509:8 Jul 2452:29 Jun 2439:19 Jun 2429:8 Jun 2372:30 May 2359:20 May 2349:9 May 2343:10 May 2295:30 Apr 2282:20 Apr 2265:comm. 2251:9 Apr 2245:10 Apr 2197:31 Mar 2184:21 Mar 2171:11 Mar 2114:9 Feb 751:gives 624:gives 501:isLeap 499:where 144:  140:  136:  2945:6 Dec 2931:1 Dec 2924:2 Dec 2909:1 Dec 2865:6 Nov 2851:1 Nov 2844:2 Nov 2829:1 Nov 2791:year 2789:leap 2779:ord. 2764:7 Oct 2750:1 Oct 2743:2 Oct 2728:1 Oct 2684:7 Sep 2670:1 Sep 2663:2 Sep 2648:1 Sep 2604:8 Aug 2590:1 Aug 2583:2 Aug 2568:1 Aug 2530:year 2528:leap 2518:ord. 2503:9 Jul 2489:1 Jul 2482:2 Jul 2467:1 Jul 2423:9 Jun 2409:1 Jun 2402:2 Jun 2387:1 Jun 2332:1 May 2325:2 May 2310:1 May 2272:year 2270:leap 2260:ord. 2234:1 Apr 2227:2 Apr 2212:1 Apr 2160:1 Mar 2153:2 Mar 2138:1 Mar 2100:1 Feb 2057:1 Jan 2045:year 2043:leap 2033:ord. 1456:with 1147:in a 897:Table 569:With 351:From 348:be 0. 225:JDATE 223:, or 154:is a 40:, or 2786:year 2781:date 2525:year 2520:date 2267:year 2262:date 2040:year 2035:date 972:Add 964:Dec 838:63.2 812:and 773:63.2 719:and 680:= 2, 655:91.4 646:63.2 598:and 537:+ 31 471:For 406:+ 12 373:Add 344:Let 328:and 161:year 138:22nd 104:Date 2993:366 2982:365 2970:360 2957:350 2938:340 2918:336 2902:335 2890:330 2877:320 2858:310 2838:306 2822:305 2810:300 2797:290 2757:280 2737:275 2721:274 2709:270 2696:260 2677:250 2657:245 2641:244 2629:240 2616:230 2597:220 2577:214 2561:213 2549:210 2536:200 2496:190 2476:183 2460:182 2448:180 2435:170 2416:160 2396:153 2380:152 2368:150 2355:140 2339:130 2319:122 2303:121 2291:120 2278:110 2241:100 2221:092 2205:091 2193:090 2180:080 2167:070 2147:061 2130:060 2120:050 2107:040 2093:032 2084:030 2074:020 2064:010 2050:001 1958:0.6 1932:300 1921:mod 1868:300 1778:0.6 1752:200 1741:mod 1688:200 1598:0.6 1572:100 1561:mod 1508:100 1377:mod 1333:0.6 1293:mod 1185:by 1096:0.6 1052:335 1049:305 1046:274 1043:244 1040:213 1037:182 1034:152 1031:121 1008:334 1005:304 1002:273 999:243 996:212 993:181 990:151 987:120 959:Nov 954:Oct 949:Sep 944:Aug 939:Jul 934:Jun 929:May 924:Apr 919:Mar 914:Feb 909:Jan 891:= 3 884:= 2 859:0.4 853:119 788:0.2 552:Mar 515:Mar 489:Mar 453:153 433:Mar 408:if 377:to 366:to 360:- 1 269:by 233:JDN 219:or 188:or 180:or 173:day 150:An 93:UTC 3064:: 1964:11 1938:30 1893:11 1876:30 1822:19 1804:20 1758:30 1696:30 1642:10 1624:10 1578:30 1516:30 1429:30 1397:30 1313:30 1254:30 1151:. 1070:30 1055:2 1028:91 1025:60 1022:31 1011:3 984:90 981:59 978:31 967:i 962:12 957:11 952:10 912:14 907:13 847:56 782:56 547:= 533:= 523:= 484:= 444:. 324:, 221:JD 44:, 36:, 3050:. 2996:— 2949:0 2943:0 2928:0 2922:0 2906:0 2869:0 2863:0 2848:0 2842:0 2826:0 2768:0 2762:0 2747:0 2741:0 2725:0 2688:0 2682:0 2667:0 2661:0 2645:0 2608:0 2602:0 2587:0 2581:0 2565:0 2507:0 2501:0 2486:0 2480:0 2464:0 2427:0 2421:0 2406:0 2400:0 2384:0 2347:0 2329:0 2323:0 2307:0 2249:0 2231:0 2225:0 2209:0 2157:0 2151:0 2135:0 2112:0 2097:0 2054:0 2005:5 1999:= 1996:7 1990:2 1987:+ 1984:0 1981:= 1973:) 1970:1 1967:+ 1961:( 1947:2 1944:+ 1941:) 1935:, 1929:( 1917:= 1914:d 1890:= 1887:1 1884:+ 1872:/ 1860:= 1857:m 1819:= 1816:4 1810:3 1807:+ 1801:= 1793:) 1790:1 1787:+ 1784:7 1781:( 1767:3 1764:+ 1761:) 1755:, 1749:( 1737:= 1734:d 1713:7 1710:= 1707:1 1704:+ 1692:/ 1680:= 1677:m 1639:= 1636:3 1630:3 1627:+ 1621:= 1613:) 1610:1 1607:+ 1604:4 1601:( 1587:3 1584:+ 1581:) 1575:, 1569:( 1557:= 1554:d 1533:4 1530:= 1527:1 1524:+ 1512:/ 1500:= 1497:m 1467:d 1464:o 1444:) 1441:1 1435:m 1432:( 1423:d 1420:o 1400:) 1394:, 1391:d 1388:o 1385:( 1348:) 1345:1 1342:+ 1339:m 1336:( 1322:i 1319:+ 1316:) 1310:, 1307:d 1304:o 1301:( 1289:= 1286:d 1265:1 1262:+ 1250:/ 1246:d 1243:o 1235:= 1232:m 1212:) 1206:( 1201:) 1197:( 1179:. 1122:i 1111:) 1108:1 1105:+ 1102:m 1099:( 1088:+ 1085:) 1082:1 1076:m 1073:( 1019:0 975:0 947:9 942:8 937:7 932:6 927:5 922:4 917:3 889:n 882:n 850:+ 841:n 830:= 827:O 814:d 810:m 785:+ 776:n 765:= 762:O 739:4 736:+ 733:m 730:= 727:d 707:1 704:+ 701:n 698:2 695:= 692:m 678:n 649:n 638:= 635:O 612:m 609:= 606:d 586:n 583:2 580:= 577:m 562:" 549:O 545:O 535:d 531:O 525:d 521:O 512:O 497:, 495:) 493:y 486:O 482:O 474:m 459:5 456:/ 441:d 437:m 430:O 423:m 417:m 411:m 404:m 399:m 381:. 379:O 375:d 368:O 364:i 358:m 354:i 346:O 330:d 326:m 322:y 318:O 296:) 290:( 285:) 281:( 263:. 217:" 213:" 95:) 80:) 74:( 69:) 65:( 51:.

Index

list of references
related reading
external links
inline citations
improve
introducing
Learn how and when to remove this message
UTC

Mission control center
universal time
calendar date
year
ordinal number
day
ISO 8601 ordinal date
decimal part
Julian date
Julian day
original research
improve it
verifying
inline citations
Learn how and when to remove this message
reference date
calculating the day of the week
Zeller's congruence
Doomsday
leap year
original research

Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.