What is the day of the year?

It's the ordinal position of a date within its year — 1 January is day 1, 31 December is day 365 (or 366 in a leap year).

How many days are in a year?

365 in a common year and 366 in a leap year (when February has 29 days). This tool detects leap years automatically.

Day of the Year Calculator

Free day-of-year calculator. Enter a date to get its ordinal day number (1–366), the days remaining in the year, the total days in that year, and the percentage of the year elapsed.

Find which day of the year a date is, and how many days remain.

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