A leap year has 366 days instead of 365.
How Many Days Are in a Leap Year: explained
February has 29 days in a leap year.
Most years divisible by four are leap years, with century exceptions.
Useful reference
For precise calendar calculations, choose the actual start and end dates and decide whether to count both endpoints. Leap days matter in spans that cross February 29.
When the answer can differ
The extra day helps keep the calendar aligned with Earth’s orbit.
Common questions
What should I remember?
A leap year has 366 days instead of 365.
What is an easy mistake to avoid?
The extra day helps keep the calendar aligned with Earth’s orbit.
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