What are the leap years?

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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.

1900190419081912191619201924192819321936
1940194419481952195619601964196819721976
1980198419881992199620002004200820122016
2020202420282032203620402044204820522056
2060206420682072207620802084208820922096
2100210421082112211621202124212821322136
2140214421482152215621602164216821722176
2180218421882192219622002204220822122216
2220222422282232223622402244224822522256
2260226422682272227622802284228822922296
2300230423082312231623202324232823322336
2340234423482352235623602364236823722376
2380238423882392239624002404240824122416
2420242424282432243624402444244824522456
2460246424682472247624802484248824922496
2500250425082512251625202524252825322536
2540254425482552255625602564256825722576
2580258425882592259626002604260826122616
2620262426282632263626402644264826522656
2660266426682672267626802684268826922696
2700270427082712271627202724272827322736
2740274427482752275627602764276827722776
2780278427882792279628002804280828122816
2820282428282832283628402844284828522856
2860286428682872287628802884288828922896
2900290429082912291629202924292829322936
2940294429482952295629602964296829722976
298029842988299229963000

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: 1900DivisionComments
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: 2100DivisionComments
    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: 2200DivisionComments
      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: 2300DivisionComments
        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: 2500DivisionComments
        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: 2600DivisionComments
        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: 2700DivisionComments
        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: 2900DivisionComments
        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: 3000DivisionComments
        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.

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