1966 is a leap year or not?
A leap year has 366 days instead of 365, with an extra day on 29 February, and it occurs in years divisible by 4 — except century years, which must also be divisible by 400. This free online Leap Year Calculator tells you instantly whether any given year is a leap year.
Leap Year Calculator
Using the online Leap Year Calculator is very straightforward. Just enter a year and we'll tell you if that year is a leap year or not.Leap Year Calculator - 1966 is a leap year or not?
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Frequently asked questions
How do I know if a year is a leap year?
A year is a leap year if it is divisible by 4, except for century years, which must be divisible by 400. So 2024 and 2000 are leap years, but 1900 is not.
Why do we have leap years?
A solar year is about 365.24 days, so adding a day every four years keeps the calendar aligned with the seasons. Without it, dates would slowly drift.
Is 2100 a leap year?
No. Although 2100 is divisible by 4, it is a century year not divisible by 400, so it is not a leap year.
When is the next leap year?
Leap years occur every four years. Enter a year in the calculator to see whether it is one and find the next leap year after it.
What happens if you are born on 29 February?
People born on 29 February, sometimes called leaplings, officially celebrate on 28 February or 1 March in common years, but their true birthday returns every four years.