List of Leap Years: Julian and Gregorian Leap Years
List of Leap Years: Julian and Gregorian Leap Years
List of Leap Years: Julian and Gregorian calendars from 46 BC to 2100+, showing how leap years are calculated across history.
Do you know what a leap year is and how to easily determine it? In today's report, you will find the list of leap years according to the Julian and Gregorian calendars. You can also see the complete list of leap years from 46 BC to 2100.
Today's important list of leap years has been created according to the calendar rules set by Julius Caesar and Pope Gregory XIII.
Leap year is a special year that usually comes every four years. In a normal year, February has 28 days, but if a year is a leap year, February is counted as 29 days. That is, instead of 365 days in a normal year, a year in a leap year is completed in 366 days.
However, according to the standard calendar, a year is completed in 365 days—this is absolutely correct. However, the length of the year is determined differently according to different calendars and astronomical calculations. For example, according to the Gregorian Calendar, a normal year is considered 365 days and a leap year is considered 366 days. According to the Julian calendar, a year is calculated as an average of 365.25 days. Sidereal Year is approximately 365.256363004 days and Tropical Year is approximately 365.242190 days (approximate).
Common years and leap years are currently calculated according to the modern Gregorian Calendar. However, before the Gregorian system was introduced, years and leap years were calculated according to the Julian system.
Julian System
According to the Julian system, common years and leap years were determined in the calendar. The Julian calendar began in 46 BC. It was introduced in ancient Rome by Julius Caesar.
In the Julian system, according to Julius Caesar's rules, a year was calculated as an average of 365.25 days and a leap year was considered every 4 years in a very simple way.
A common example of a leap year according to the Julian system is: 4, 8, 12, 16, 20, 24, 28…
If leap years are calculated in the Julian system according to different times, then the examples would be:
- 1st century: 4, 8, 12, 16, 20…
- 5th century: 404, 408, 412, 416…
- 10th century: 904, 908, 912…
- 15th century: 1404, 1408, 1412…
In this system, leap years are calculated every 4 years, without any exceptions. There are no complex mathematical rules here, so some amount of error is created in the long run.
To eliminate this error, the modern and more accurate Gregorian calendar was later introduced.
Gregorian Calendar System
The Gregorian calendar (Gregorian system) began in 1582 AD. Its originator was Pope Gregory XIII. He introduced this modern calendar through the Roman Catholic Church in 1582.
The rule for determining leap years in the Gregorian calendar is:
A leap year occurs every 4 years
But a year divisible by 100 is not a leap year
However, if it is divisible by 400, it is again considered a leap year
Example:
The year 1600 is a leap year, because it is divisible by 400
- The years 1700 and 1900 are not leap years
- The years 2000 and 2024 are leap years
Why was the Gregorian calendar introduced?
The Julian calendar was making an error of about 1 day every 128 years. Due to this error, there was a gradual discrepancy between the calendar and the actual season.
There was a problem in determining especially important religious dates, such as Easter. The Gregorian calendar was introduced to solve this problem.
Currently, almost all countries in the world follow the Gregorian calendar.
List of leap years
The list of Leap Years according to the Julian and Gregorian calendars is mentioned. Where according to the Julian calendar system, the leap year list is given from 46 BC to 1582 AD and according to the Gregorian calendar system, the leap year list is given from 1582 to 2100 AD.
List of Julian leap year (46BC to 1582)
Early Julian Leap Years (BC Era)
45 BC, 41 BC, 37 BC, 33 BC, 29 BC, 25 BC, 21 BC, 17 BC, 13 BC, 9 BC, 5 BC, 1 BC
Julian Leap Years in the AD Era
1st Century (1–100 AD)
4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56, 60, 64, 68, 72, 76, 80, 84, 88, 92, 96
2nd Century (101–200 AD)
104, 108, 112, 116, 120, 124, 128, 132, 136, 140, 144, 148, 152, 156, 160, 164, 168, 172, 176, 180, 184, 188, 192, 196
3rd Century (201–300 AD)
204, 208, 212, 216, 220, 224, 228, 232, 236, 240, 244, 248, 252, 256, 260, 264, 268, 272, 276, 280, 284, 288, 292, 296
4th Century (301–400 AD)
304, 308, 312, 316, 320, 324, 328, 332, 336, 340, 344, 348, 352, 356, 360, 364, 368, 372, 376, 380, 384, 388, 392, 396
5th Century (401–500 AD)
404, 408, 412, 416, 420, 424, 428, 432, 436, 440, 444, 448, 452, 456, 460, 464, 468, 472, 476, 480, 484, 488, 492, 496
6th Century (501–600 AD)
504, 508, 512, 516, 520, 524, 528, 532, 536, 540, 544, 548, 552, 556, 560, 564, 568, 572, 576, 580, 584, 588, 592, 596
7th Century (601–700 AD)
604, 608, 612, 616, 620, 624, 628, 632, 636, 640, 644, 648, 652, 656, 660, 664, 668, 672, 676, 680, 684, 688, 692, 696
8th Century (701–800 AD)
704, 708, 712, 716, 720, 724, 728, 732, 736, 740, 744, 748, 752, 756, 760, 764, 768, 772, 776, 780, 784, 788, 792, 796
9th Century (801–900 AD)
804, 808, 812, 816, 820, 824, 828, 832, 836, 840, 844, 848, 852, 856, 860, 864, 868, 872, 876, 880, 884, 888, 892, 896
10th Century (901–1000 AD)
904, 908, 912, 916, 920, 924, 928, 932, 936, 940, 944, 948, 952, 956, 960, 964, 968, 972, 976, 980, 984, 988, 992, 996
11th Century (1001–1100 AD)
1004, 1008, 1012, 1016, 1020, 1024, 1028, 1032, 1036, 1040, 1044, 1048, 1052, 1056, 1060, 1064, 1068, 1072, 1076, 1080, 1084, 1088, 1092, 1096
12th Century (1101–1200 AD)
1104, 1108, 1112, 1116, 1120, 1124, 1128, 1132, 1136, 1140, 1144, 1148, 1152, 1156, 1160, 1164, 1168, 1172, 1176, 1180, 1184, 1188, 1192, 1196
13th Century (1201–1300 AD)
1204, 1208, 1212, 1216, 1220, 1224, 1228, 1232, 1236, 1240, 1244, 1248, 1252, 1256, 1260, 1264, 1268, 1272, 1276, 1280, 1284, 1288, 1292, 1296
14th Century (1301–1400 AD)
1304, 1308, 1312, 1316, 1320, 1324, 1328, 1332, 1336, 1340, 1344, 1348, 1352, 1356, 1360, 1364, 1368, 1372, 1376, 1380, 1384, 1388, 1392, 1396
15th Century (1401–1500 AD)
1404, 1408, 1412, 1416, 1420, 1424, 1428, 1432, 1436, 1440, 1444, 1448, 1452, 1456, 1460, 1464, 1468, 1472, 1476, 1480, 1484, 1488, 1492, 1496
16th Century (1501–1582 AD)
1504, 1508, 1512, 1516, 1520, 1524, 1528, 1532, 1536, 1540, 1544, 1548, 1552, 1556, 1560, 1564, 1568, 1572, 1576, 1580
List of Gregorian leap year (1582 to 2100+)
Gregorian Leap Years in the 16th Century (1582–1600)
1584, 1588, 1592, 1596, 1600
Gregorian Leap Years in the 17th Century (1601–1700)
1604, 1608, 1612, 1616, 1620, 1624, 1628, 1632, 1636, 1640, 1644, 1648, 1652, 1656, 1660, 1664, 1668, 1672, 1676, 1680, 1684, 1688, 1692, 1696
Gregorian Leap Years in the 18th Century (1701–1800)
1704, 1708, 1712, 1716, 1720, 1724, 1728, 1732, 1736, 1740, 1744, 1748, 1752, 1756, 1760, 1764, 1768, 1772, 1776, 1780, 1784, 1788, 1792, 1796
Gregorian Leap Years in the 19th Century (1801–1900)
1804, 1808, 1812, 1816, 1820, 1824, 1828, 1832, 1836, 1840, 1844, 1848, 1852, 1856, 1860, 1864, 1868, 1872, 1876, 1880, 1884, 1888, 1892, 1896
Gregorian Leap Years in the 20th Century (1901–2000)
1904, 1908, 1912, 1916, 1920, 1924, 1928, 1932, 1936, 1940, 1944, 1948, 1952, 1956, 1960, 1964, 1968, 1972, 1976, 1980, 1984, 1988, 1992, 1996, 2000
Gregorian Leap Years in the 21st Century (2001–2100)
2004, 2008, 2012, 2016, 2020, 2024, 2028, 2032, 2036, 2040, 2044, 2048, 2052, 2056, 2060, 2064, 2068, 2072, 2076, 2080, 2084, 2088, 2092, 2096
Important Century Exceptions
According to the Gregorian calendar:
1700 is not a leap year
1800 is not a leap year
1900 is not a leap year
2000 is Leap year (divisible by 400)
2100 is not a leap year
Upcoming Gregorian Leap Years After 2100
2104, 2108, 2112, 2116, 2120, 2124...
Conclusion
List of leap years shows us how the world's calendar system operates according to a specific scientific rule of time calculation. Although both the Julian and Gregorian systems have the concept of leap year, there are differences in their rules and accuracy. While the Julian calendar simply considers leap years every four years, the Gregorian calendar is more accurate due to the addition of additional conditions.
This list clearly shows that leap year is not just a mathematical concept, but it is an important system for maintaining the seasons and time of the world correctly. Therefore, knowing the rules of leap year and its historical changes is very important for understanding the correct calendar.
Related tools,
অর্ডিনারি আইটির নীতিমালা মেনে কমেন্ট করুন। প্রতিটি কমেন্ট রিভিউ করা হয়।
comment url