The leap years are years when an extra day is added to the end of the shortest month, February, to keep the calendar year synchronized with the astronomical year.

Ordinary Year, February has 28 days, whereas in the leap year, February has 29 days. And, February 29 is commonly referred to as leap day.

## How to Calculate Leap Years?

These are the three rules to calculate leap years.

The year must be evenly divisible by 4.

The year must not be divisible by 100, then, it is a leap year.

The year is also evenly divisible by 400. Then, it is a leap year.

## For example:

Let’s check this year 2024. 2024 is evenly divisible by 4 (2024 / 4 = 506) and this year is not divisible by 100 (2024/100 = 20.24). So, **2024 is a leap year.**

## Leap Years from 1900 to 3000

See the table below for a list of leap years from 1900 to 3000. The leap years fall every 4 years.

1900 | 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 |

2100 | 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 | 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 | 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 | 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 | 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 | 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 | 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 | 2804 | 2808 | 2812 | 2816 |

2820 | 2824 | 2828 | 2832 | 2836 | 2840 | 2844 | 2848 | 2852 | 2856 |

2860 | 2864 | 2868 | 2872 | 2876 | 2880 | 2884 | 2888 | 2892 | 2896 |

2904 | 2908 | 2912 | 2916 | 2920 | 2924 | 2928 | 2932 | 2936 | |

2940 | 2944 | 2948 | 2952 | 2956 | 2960 | 2964 | 2968 | 2972 | 2976 |

2980 | 2984 | 2988 | 2992 | 2996 |

Note: The highlighted and strikethrough Years like 1900, 2100, 2200, 2300, 2500, 2600, 2700, 2900, and 3000 are not leap years.

## Why 1900, 2100, 2200, 2300, 2500, 2600, 2700, 2900, and 3000 are not a leap year?

Let’s do some Leap year calculation rules. The three rules are already explained above.

Here, I am going to tell you again in short. A leap year is a year that **must be evenly divisible by 4 and 400** and **must not be evenly divisibly by 100**.

Let’s check each year which is not a leap year.

## 1. **1900**

Year: 1900 | Division | Comments |
---|---|---|

1. 1900 division by 4. | 1900/4 = 475 | evenly division by 4 |

2. 1900 division by 100. | 1900/100 = 19 | must not be evenly divided by 100 |

3. 1900 division by 400. | 1900/400 = 4.75 | must be evenly divided by 400. |

**Here, you can clearly see that the year 1900 passed rule number 1 but failed in rules 2 and 3. So, this is not a leap year.**

## 2. **2100**

Year: 2100 | Division | Comments |
---|---|---|

1. 2100 division by 4. | 2100/4 = 525 | evenly division by 4 |

2. 2100 division by 100. | 2100/100 = 21 | must not be evenly divided by 100 |

3. 2100 division by 400. | 2100/400 = 5.25 | must be evenly divided by 400. |

**Here, you can clearly see that the year 2100 passed rule number 1 but failed in rules 2 and 3. So, this is not a leap year.**

## 3. **2200**

Year: 2200 | Division | Comments |
---|---|---|

1. 2200 division by 4. | 2200 /4 = 550 | evenly division by 4 |

2. 2200 division by 100. | 2200 /100 = 22 | must not be evenly divided by 100 |

3. 2200 division by 400. | 2200 /400 = 5.5 | must be evenly divided by 400. |

**Here, you can clearly see that the year 2200 passed rule number 1 but failed in rules 2 and 3. So, this is not a leap year.**

## 4. **2300**

Year: 2300 | Division | Comments |
---|---|---|

1. 2300 division by 4. | 2300 /4 = 575 | evenly division by 4 |

2. 2300 division by 100. | 2300 /100 = 23 | must not be evenly divided by 100 |

3. 2300 division by 400. | 2300 /400 = 5.75 | must be evenly divided by 400. |

**Here, you can clearly see that the year 2300 passed rule number 1 but failed in rules 2 and 3. So, this is not a leap year.**

## 5. **2500**

Year: 2500 | Division | Comments |
---|---|---|

1. 2500 division by 4. | 2500 /4 = 625 | evenly division by 4 |

2. 2500 division by 100. | 2500 /100 = 25 | must not be evenly divided by 100 |

3. 2500 division by 400. | 2500 /400 = 6.25 | must be evenly divided by 400. |

**Here, you can clearly see that the year 2500 passed rule number 1 but failed in rules 2 and 3. So, this is not a leap year.**

## 6. **2600**

Year: 2600 | Division | Comments |
---|---|---|

1. 2600 division by 4. | 2600 /4 = 650 | evenly division by 4 |

2. 2600 division by 100. | 2600 /100 = 26 | must not be evenly divided by 100 |

3. 2600 division by 400. | 2600 /400 = 6.5 | must be evenly divided by 400. |

**Here, you can clearly see that the year 2600 passed rule number 1 but failed in rules 2 and 3. So, this is not a leap year.**

## 7. **2700**

Year: 2700 | Division | Comments |
---|---|---|

1. 2700 division by 4. | 2700 /4 = 675 | evenly division by 4 |

2. 2700 division by 100. | 2700 /100 = 27 | must not be evenly divided by 100 |

3. 2700 division by 400. | 2700 /400 = 6.75 | must be evenly divided by 400. |

**Here, you can clearly see that the year 2700 passed rule number 1 but failed in rules 2 and 3. So, this is not a leap year.**

## 8. **2900**

Year: 2900 | Division | Comments |
---|---|---|

1. 2900 division by 4. | 2900 /4 = 725 | evenly division by 4 |

2. 2900 division by 100. | 2900 /100 = 29 | must not be evenly divided by 100 |

3. 2900 division by 400. | 2900 /400 = 7.25 | must be evenly divided by 400. |

**Here, you can clearly see that the year 2900 passed rule number 1 but failed in rules 2 and 3. So, this is not a leap year.**

## 9. **3000**

Year: 3000 | Division | Comments |
---|---|---|

1. 3000 division by 4. | 3000 /4 = 750 | evenly division by 4 |

2. 3000 division by 100. | 3000 /100 = 30 | must not be evenly divided by 100 |

3. 3000 division by 400. | 3000 /400 = 7.5 | must be evenly divided by 400. |

**Here, you can clearly see that the year 3000 passed rule number 1 but failed in rules 2 and 3. So, this is not a leap year.**