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Day of Year Calculator

Convert between calendar dates and day of year numbers (1-365/366).

Day of Year

Convert between dates and day of year

Result
Date:

19/04/2026

Sunday

Day of Year:

109 / 365

Leap Year:

No

The day of year indicates the position of a date within the year (1-365, or 1-366 in leap years). Useful for planning and date calculations.