What is a Leap Year?
A leap year is an adjustment made to align the calendar year with the astronomical year (the Earth’s orbit around the Sun). 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. The key feature of a leap year is that February has 29 days, making the total number of days in the year 366.
How to Determine if a Year is a Leap Year?
To determine if a year is a leap year, follow these rules:
- 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 2025. According to the rules mentioned above:
- 2025 ÷ 4 = 506.25
- 2025 ÷ 100 = 20.25
- 2025 ÷ 400 = 5.0625
Since 2025 is neither divisible by 4 nor by 400, it is not a leap year.
When is the Next Leap Year?
It is currently 2025. 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).
2026
- 2026 ÷ 4 = 506.5
- 2026 ÷ 100 = 20.26
- 2026 ÷ 400 = 5.065
2026 is not divisible by 4 or 400, so it is not a leap year.
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 |