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 1850 a leap year or a common year? When was the last leap year before 1850? When is the next leap year after 1850? Jan 13 23:44 UTC (GMT)
Is 1850 a leap year or a common year? When was the last leap year before 1850? When is the next leap year after 1850? Jan 13 23:42 UTC (GMT)
Is 2720 a leap year or a common year? When was the last leap year before 2720? When is the next leap year after 2720? Jan 13 23:27 UTC (GMT)
Is 2720 a leap year or a common year? When was the last leap year before 2720? When is the next leap year after 2720? Jan 13 23:27 UTC (GMT)
Is 2054 a leap year or a common year? When was the last leap year before 2054? When is the next leap year after 2054? Jan 13 23:20 UTC (GMT)
Is 2121 a leap year or a common year? When was the last leap year before 2121? When is the next leap year after 2121? Jan 13 23:13 UTC (GMT)
Is 2766 a leap year or a common year? When was the last leap year before 2766? When is the next leap year after 2766? Jan 13 23:01 UTC (GMT)
Is 2136 a leap year or a common year? When was the last leap year before 2136? When is the next leap year after 2136? Jan 13 22:32 UTC (GMT)
Is 3888 a leap year or a common year? When was the last leap year before 3888? When is the next leap year after 3888? Jan 13 22:24 UTC (GMT)
Is 1583 a leap year or a common year? When was the last leap year before 1583? When is the next leap year after 1583? Jan 13 22:12 UTC (GMT)
Is 2202 a leap year or a common year? When was the last leap year before 2202? When is the next leap year after 2202? Jan 13 22:10 UTC (GMT)
Is 1582 a leap year or a common year? When was the last leap year before 1582? When is the next leap year after 1582? Jan 13 22:08 UTC (GMT)
Is 1583 a leap year or a common year? When was the last leap year before 1583? When is the next leap year after 1583? Jan 13 22:08 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.