Leap Years

A leap year has 366 days rather than the usual 365 days. This extra day is added to the month of February, making it a 29-day month instead of the usual 28 days.

Leap years are necessary because the Earth's orbit around the Sun is approximately 365.24 days, not exactly 365 days.

The rules for leap years are the following:

  1. A year that is divisible by 4 is a leap year.
  2. However, a year that is divisible by 100 is not a leap year unless it is also divisible by 400.

2024 is a leap year, with February 29 as a leap day.

What is a leap year?

A leap year is a year with one extra day compared to a common year.


How many days in leap year?

A leap year has 366 days.


How to know if it is a leap year?

We can determine if a given year is a leap year using these rules.

To determine if a year is a leap year:

  1. If the year is divisible by 4, go to step 2. If not, it is not a leap year.
  2. If the year is divisible by 100, go to step 3. If not, results in a leap year.
  3. If the year can be divided by 400, it is a leap year. If not, it is not a leap year.


How to calculate a leap year?

Following the rules mentioned above, let's see if 2024 is a leap year:

  1. 2024/4 = 506.
  2. 2024 is not divisible with 100, so 2024 is a leap year.


When is the next leap year?

The next leap year is 2028 and the next leap day is February 29, 2028. Future leap years include 2032, 2036, and 2040.

Leap YearLeap Day
2024Thursday, February 29
2028Tuesday, February 29
2032Sunday, February 29
2036Friday, February 29
2040Wednesday, February 29


What is a leap day?

February 29 is a calendar date caled leap day. This day occurs around every four years and is added to create leap years in the Julian and Gregorian calendars. February 29 is the last day of February and the 60th day of a leap year. Additionally, 306 days remain after the leap day in the year.

In leap years, it also marks the end of meteorological summer in the Southern Hemisphere and the end of meteorological winter in the Northern Hemisphere.


How often is leap year?

Leap years occur every four years, with one exception. The exception is when the year is divisible by 100 and not divisible by 400.


When was the previous leap year?

The previous leap year was 2020. Other leap years that passed recently are 2016, 2012, 2008, 2004, or 2000.


Is 2024 a leap year?

Yes, 2024 is a leap year since can be divided by four.

We can see that it is not divisible by 100 (2024/100=20,24) but divisible by 4 (2024/4= 506). Thus, 2024 will be a leap year, just as the previous one, which occurred in 2020.


Leap year years list

In the following table you can find the list of leap years from 1800 till 2400. In each of the following six columns you can see the leap years in each century 18, 19, 20, 21, 22 and 23th.

1804
1808
1812
1816
1820
1824
1828
1832
1836
1840
1844
1848
1852
1856
1860
1864
1868
1872
1876
1880
1884
1888
1892
1896
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
2004
2008
2012
2016
2020
2024
2028
2032
2036
2040
2044
2048
2052
2056
2060
2064
2068
2072
2076
2080
2084
2088
2092
2096
2104
2108
2112
2116
2120
2124
2128
2132
2136
2140
2144
2148
2152
2156
2160
2164
2168
2172
2176
2180
2184
2188
2192
2196
2204
2208
2212
2216
2220
2224
2228
2232
2236
2240
2244
2248
2252
2256
2260
2264
2268
2272
2276
2280
2284
2288
2292
2296
2304
2308
2312
2316
2320
2324
2328
2332
2336
2340
2344
2348
2352
2356
2360
2364
2368
2372
2376
2380
2384
2388
2392
2396
2400

*The years 1900, 2100, 2200, 2300 are not leap years, that's why they do not appear in the list.


FAQ Leap Year

When the leap year rules were introduced?

The rules for leap years were introduced to ensure that the calendar year aligns as closely as possible with the solar year. Without leap years, the calendar would gradually drift out of sync with the seasons.

The concept of leap years, a fascinating part of our history, dates back to the time of Julius Caesar in ancient Rome. The Julian calendar, introduced by Julius Caesar in 45 BCE, established the basic rules for leap years. However, it was later refined by the Gregorian calendar, introduced by Pope Gregory XIII in 1582, to provide a more accurate alignment with the solar year.


Why do we have leap years?

Leap years, a necessary adjustment, occur approximately every four years, but not exactly. The average length of a solar year is about 365.24 days, so adding an extra day every four years compensates for the additional fraction of a day. This adjustment ensures that the calendar remains relatively synchronized with the Earth's orbit around the Sun.


Why is it called leap year?

Leap years are called "leap" years because we "leap" or add an extra day to the calendar, effectively extending the month of February to 29 days instead of the usual 28.


Why aren't leap years always every four years?

Leap years are not always every four years because of the exception if a year is divisible by 100; it is not a leap year unless it is also divisible by 400. This rule helps to maintain the accuracy of our calendar.

Let's see the details: Leap years are not always every four years due to the adjustment needed to account for the slightly shorter solar year of 365.24 days. By skipping leap years in some instances (those divisible by 100 but not by 400), the calendar system compensates for the slight discrepancy and keeps the calendar year more closely aligned with the solar year.