How many days does February have in a leap year?

29 days, compared to 28 in a non-leap year — the extra day added to keep the calendar aligned with Earth's orbit.

Days in Month Calculator

Find the exact number of days in any calendar month, correctly accounting for leap years in February.

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Calculated from the Gregorian calendar, including the February leap year rule

Calendar Curiosities: Quarters, Zodiac Signs, Seasons, and Centuries

How calendar quarters, zodiac signs, meteorological seasons, centuries, and the days in a given month are each determined.

Leap Year Checker

Check whether a given year is a leap year.

Age Calculator

Calculate your exact age in years, months, and days.

Date Difference Calculator

Calculate the number of days, weeks, and months between two dates.

Day of the Week Calculator

Find out what day of the week any date falls on.

Countdown Calculator

Calculate the time remaining until a future date and time.

Time Duration Calculator

Calculate the duration between two clock times in hours and minutes.