Leap Years Calculator. Check if the Year Is a Leap Year or a Common One. Find the Last Leap Year Before and the Next Leap Year After. The Leap Year Algorithm

Check if the year meets the conditions of the Leap Year Algorithm

Leap Year Calculator: Is it a leap year?

The leap year algorithm. The three conditions to check:

  • 1) A year that is divisible by 4 (there is no remainder when divided by 4) is a leap year.
  • 2) But if the year is also divisible by 100, it's not a leap year, unless....
  • 3) ... Unless it's divisible by 400.

Latest checked up years / Is it a leap year or a common year?

Is 2800 a leap year or a common year? When was the last leap year before 2800? When is the next leap year after 2800? Sep 13 15:49 UTC (GMT)
Is 2082 a leap year or a common year? When was the last leap year before 2082? When is the next leap year after 2082? Sep 13 15:41 UTC (GMT)
Is 1822 a leap year or a common year? When was the last leap year before 1822? When is the next leap year after 1822? Sep 13 15:41 UTC (GMT)
Is 2600 a leap year or a common year? When was the last leap year before 2600? When is the next leap year after 2600? Sep 13 15:35 UTC (GMT)
Is 3310 a leap year or a common year? When was the last leap year before 3310? When is the next leap year after 3310? Sep 13 15:33 UTC (GMT)
Is 4112 a leap year or a common year? When was the last leap year before 4112? When is the next leap year after 4112? Sep 13 15:32 UTC (GMT)
Is 2113 a leap year or a common year? When was the last leap year before 2113? When is the next leap year after 2113? Sep 13 15:31 UTC (GMT)
Is 1741 a leap year or a common year? When was the last leap year before 1741? When is the next leap year after 1741? Sep 13 15:30 UTC (GMT)
Is 4576 a leap year or a common year? When was the last leap year before 4576? When is the next leap year after 4576? Sep 13 15:17 UTC (GMT)
Is 4608 a leap year or a common year? When was the last leap year before 4608? When is the next leap year after 4608? Sep 13 15:16 UTC (GMT)
Is 2521 a leap year or a common year? When was the last leap year before 2521? When is the next leap year after 2521? Sep 13 15:16 UTC (GMT)
Is 3094 a leap year or a common year? When was the last leap year before 3094? When is the next leap year after 3094? Sep 13 15:11 UTC (GMT)
Is 4776 a leap year or a common year? When was the last leap year before 4776? When is the next leap year after 4776? Sep 13 15:03 UTC (GMT)
» New: All the Calculations Performed by Our Visitors: Leap Years Calculations. Data organized on a Monthly Basis
» [This dataset no longer updated] All the users checked up years / Leap Years or Common Years

Leap Years. Common Years. What are they and why do we need them? The leap years algorithm.

What is a leap year? What is a common year?

A leap year contains 1 extra day, February 29th, over an ordinary year, 366 vs. 365.

How often do the leap years occur in the calendar?

Nearly once every four years, 97 leap years at every 400 years.

Why do we need leap years?

They keep the calendar year synchronized with the astronomical year, preventing us, for example, from celebrating Christmas in November.

The leap years algorithm.

Every year that is evenly divisible by 4 is a leap year, except for years that are evenly divisible by 100, but these years are leap years if they are evenly divisible by 400:

Examples of leap years.

  • Leap years multiples of 4 but not of 100 nor of 400: 1992, 1996, 2004, 2008, 2012, 2016, 2020, 2024, 2028;
  • Common years (NOT LEAP YEARS) multiples of 100, but not of 400: 1700, 1800, 1900, 2100, 2200, 2300;
  • Leap years multiples of 400: 1600, 2000, 2400.

Articles on the leap years

1. What is a leap year? What is a common year?

2. How often do the leap years occur in the calendar?

3. Why do we need leap years?

4. Leap years algorithm. Examples.

5. When did the actual concept of the leap year originate?

6. The modern (Gregorian) calendar and the Julian one. Julian calendar adjustment

7. How accurate is the Gregorian calendar, based on the leap year algorithm?

List of all the leap years between 1582 and 4818.