📅 Leap Year Checker
Check if a given year is a leap year.
Is 2024 a leap year? What about 2100? Our Leap Year Checker gives you an instant answer. A leap year occurs every four years to keep our calendar in sync with the Earth's orbit around the sun, but the rules are a bit more nuanced than just dividing by four. The Gregorian calendar has a specific set of criteria: a year must be divisible by 4, but not by 100, unless it is also divisible by 400.
This tool is handy for planners, students, and anyone curious about calendar oddities. Event organizers use it to determine whether February has 28 or 29 days, students learn the leap year rules for science class, and programmers use it to validate date calculations in their applications. Simply enter a year between 1582 (when the Gregorian calendar was adopted) and 9999, and the checker tells you instantly if it is a leap year.
For example, 2024 is a leap year because it is divisible by 4 but not by 100. However, 1900 was not a leap year because it is divisible by 100 but not by 400 — a common point of confusion that this tool clears up in one click.
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Frequently Asked Questions
What are the exact rules for a leap year?
Under the Gregorian calendar, a year is a leap year if it is divisible by 4. However, years divisible by 100 are not leap years unless they are also divisible by 400. For example, 2024 is a leap year, 2100 is not a leap year, but 2000 was a leap year because 2000 is divisible by 400.
Why does the calculator start at the year 1582?
The Gregorian calendar, which introduced the modern leap year rules, was adopted in 1582 by Pope Gregory XIII. Years before 1582 used the Julian calendar with different rules, so leap year calculations for those years would not be accurate using the Gregorian formula. Limiting to 1582 onward ensures every result is correct.
What happens if February 29 falls on a weekend?
When February 29 falls on a Saturday or Sunday, it can affect payroll, billing cycles, and contract deadlines for businesses and organizations. Many companies have specific policies for handling the extra day, and some people born on February 29 celebrate their birthday on February 28 or March 1 in non-leap years.
How many leap years are there in a century?
In a typical 100-year period, there are 24 leap years. This is because while there are 25 years divisible by 4 in a century, one of those (the century year) is skipped unless divisible by 400. For example, the 20th century (1901-2000) had 24 leap years since 1900 was not a leap year.
Wat is een schrikkeljaar precies?
Een schrikkeljaar is een jaar met 366 dagen in plaats van 365. De extra dag is 29 februari. Schrikkeljaren corrigeren het feit dat de aarde niet precies 365 dagen nodig heeft om rond de zon te draaien, maar ongeveer 365,25 dagen.
Waarom is 1900 geen schrikkeljaar, maar 2000 wel?
De regel: een eeuwjaar (eindigend op 00) is alleen een schrikkeljaar als het deelbaar is door 400. 1900 niet (wel /100, niet /400), 2000 wel (wel /400).
Wat is het volgende schrikkeljaar?
Schrikkeljaren komen elke 4 jaar voor. Na 2024 zijn de volgende: 2028, 2032, 2036.
Wat is een schrikkeljaar precies?
Een jaar met 366 dagen in plaats van 365. De extra dag is 29 februari. Dit corrigeert dat de aarde ~365,25 dagen nodig heeft om rond de zon te draaien.
Waarom is 1900 geen schrikkeljaar, maar 2000 wel?
Eeuwjaren zijn alleen schrikkeljaar als ze deelbaar zijn door 400. 1900: wel /100, niet /400 — geen. 2000: wel /400 — wel.
Wat is het volgende schrikkeljaar?
Na 2024: 2028, 2032, 2036. Schrikkeljaren komen elke 4 jaar voor.