Day of the year

Ordinal dates ignore clock time. Leap years add day 60 as 29 February.

Percent complete

Percent is day number divided by 365 or 366. It is a calendar fraction, not an astronomical season marker.

Questions

Is day 1 January 1?

Yes. 1 January is day 1. 31 December is 365 or 366.

Related tools

Days Left in the Year

Count completed and remaining days in the current year.
Weeks Left in the Year

Convert remaining year days into weeks.
Countdown Timer

Count down to a date and time with pause, presets, and a shareable link.
Online Timer

Set hours, minutes, and seconds. The remaining time is tracked from timestamps.