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:

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

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

To determine if a year is a leap year:

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

The next leap year is **2028**. Future leap years include 2032, 2036, and 2040.

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

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.

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 20242028 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.*

**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.