Day of Year Calculator
Find a date's ordinal day number, remaining days, and year progress.
Result
Complete the fields to see the result.
The calculation runs locally in your browser.
A date's ordinal number
Day of year counts from 1 on January 1 to 365 or 366 on December 31. The tool also shows remaining days and approximate year progress.
Leap-year effect
From February 29 onward, dates in a leap year have one additional ordinal day compared with a common year.
Frequently asked questions
What day of year is January 1?
It is always day 1.
What is the final day number?
365 in common years and 366 in leap years.
What is an ordinal date?
It identifies a date by its year and numeric position within that year.