Find Out If a Year Is a Leap Year
What is a Leap Year?
A leap year is a year with 366 days instead of the usual 365. The extra day is added to February, making it 29 days long instead of 28. In the Gregorian calendar, a leap year occurs every four years. Generally, a year is considered a leap year if it is divisible by 4, and either not divisible by 100 or divisible by 400.
Leap years exist to keep our calendar in sync with Earth's orbit around the Sun. A solar year is about 365.2422 days, not exactly 365. Over time, without leap years, our calendar would slowly drift away from the seasons.
How Do You Calculate a Leap Year?
The rules for determining whether a year is a leap year are simple but precise:
- If a year is divisible by 4 but not divisible by 100, it is a leap year.
- If a year is divisible by 400, it is also a leap year.
For example:
- 2024 is divisible by 4 but not by 100, so it is a leap year.
- 2100 is divisible by 4 and 100, but not by 400, so it is not a leap year.
- 2000 is divisible by 400, so it is a leap year.
Is This Year a Leap Year?
This year is 2026. According to the rules mentioned above:
- 2026 ÷ 4 = 506.5
- 2026 ÷ 100 = 20.26
- 2026 ÷ 400 = 5.065
Since 2026 is neither divisible by 4 nor by 400, it is not a leap year.
When is the Next Leap Year?
It is currently 2026. To find the next leap year, we need to find the next year that satisfies the leap year conditions (divisible by 4 but not by 100, or divisible by 400).
2027
- 2027 ÷ 4 = 506.75
- 2027 ÷ 100 = 20.27
- 2027 ÷ 400 = 5.0675
2027 is not divisible by 4 or 400, so it is not a leap year.
2028
- 2028 ÷ 4 = 507
- 2028 ÷ 100 = 20.28
- 2028 ÷ 400 = 5.07
2028 is divisible by 4 but not by 100, so it is a leap year.
Therefore, the next leap year is 2028.
Leap Year List
Here is a list of leap years from 1800 to 3000. You can refer to this list to find the corresponding leap years for any given range of years.
| Range | Leap Year |
|---|---|
| 1800 ~ 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 |
| 1900 ~ 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 ~ 2100 | 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 |
| 2100 ~ 2200 | 2104, 2108, 2112, 2116, 2120, 2124, 2128, 2132, 2136, 2140, 2144, 2148, 2152, 2156, 2160, 2164, 2168, 2172, 2176, 2180, 2184, 2188, 2192, 2196 |
| 2200 ~ 2300 | 2204, 2208, 2212, 2216, 2220, 2224, 2228, 2232, 2236, 2240, 2244, 2248, 2252, 2256, 2260, 2264, 2268, 2272, 2276, 2280, 2284, 2288, 2292, 2296 |
| 2300 ~ 2400 | 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 ~ 2500 | 2400, 2404, 2408, 2412, 2416, 2420, 2424, 2428, 2432, 2436, 2440, 2444, 2448, 2452, 2456, 2460, 2464, 2468, 2472, 2476, 2480, 2484, 2488, 2492, 2496 |
| 2500 ~ 2600 | 2504, 2508, 2512, 2516, 2520, 2524, 2528, 2532, 2536, 2540, 2544, 2548, 2552, 2556, 2560, 2564, 2568, 2572, 2576, 2580, 2584, 2588, 2592, 2596 |
| 2600 ~ 2700 | 2604, 2608, 2612, 2616, 2620, 2624, 2628, 2632, 2636, 2640, 2644, 2648, 2652, 2656, 2660, 2664, 2668, 2672, 2676, 2680, 2684, 2688, 2692, 2696 |
| 2700 ~ 2800 | 2704, 2708, 2712, 2716, 2720, 2724, 2728, 2732, 2736, 2740, 2744, 2748, 2752, 2756, 2760, 2764, 2768, 2772, 2776, 2780, 2784, 2788, 2792, 2796 |
| 2800 ~ 2900 | 2800, 2804, 2808, 2812, 2816, 2820, 2824, 2828, 2832, 2836, 2840, 2844, 2848, 2852, 2856, 2860, 2864, 2868, 2872, 2876, 2880, 2884, 2888, 2892, 2896 |
| 2900 ~ 3000 | 2904, 2908, 2912, 2916, 2920, 2924, 2928, 2932, 2936, 2940, 2944, 2948, 2952, 2956, 2960, 2964, 2968, 2972, 2976, 2980, 2984, 2988, 2992, 2996 |
Common Questions About Leap Years
Are leap years every 4 years?
Mostly, yes—but with exceptions. Every year divisible by 4 is a leap year except those divisible by 100, unless they're also divisible by 400.
Are leap years always even?
Yes. Leap years are always even numbers because they must be divisible by 4. For example: 2020, 2024, 2028, 2032, 2036…
How many days in a leap year?
A leap year has 366 days—one extra day added to February, making it 29 days long.
How to check if a year is leap or not?
You can apply the leap year formula above manually, or use a Leap Year Checker: just type the year, click Check, and get an instant answer.
How old would I be if I was born on a leap year?
You'd be the same age as anyone else born that year, but your actual birthday (Feb 29) only occurs every four years. In non-leap years, people born on Feb 29 typically celebrate on Feb 28 or March 1.
How do people born on February 29 legally age?
Legally, in most countries, a leap day baby's birthday is considered February 28 in non-leap years for official purposes like driver's licenses or voting eligibility. In some places, March 1 is used instead.
Why Leap Years Exist?
Without leap years, our calendar would slowly shift. After 100 years, the seasons would drift by about 24 days. Spring would start in late March, then April, and so on. Leap years realign the calendar so the equinoxes and solstices happen at roughly the same dates each year.
Why Is Every 100th Year Not a Leap Year?
Because Earth's orbit doesn't perfectly match a whole number of days. If we added a leap day every four years without exception, the calendar would slowly get ahead. Skipping leap years every 100 years (unless divisible by 400) corrects this drift.