Day of Year Calculator

Calculate which day of the year it is for any date in 2024. Quickly find out how many days have passed and how many remain.

January 10, 2025
Day 10
355 days left in 2025
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Understanding Day of Year

What is the Day of Year?

The day of year (DOY) is a number between 1 and 365 (or 366 in leap years) that represents the current day position within the year. January 1 is day 1, December 31 is day 365 (or 366 in leap years).

Common Uses

  • Project planning and scheduling
  • Scientific data analysis and research
  • Agricultural planning and crop management
  • Financial reporting and fiscal year tracking