Enter a date to see its weekday, ISO week number, day of the year, and how many days it is from today. It works for any date in the Gregorian calendar.
How to find the day
- Pick a date.
- Read the weekday and extra details.
Mental trick
The “Doomsday rule” by John Conway lets you calculate weekdays in your head: certain easy dates (4/4, 6/6, 8/8, 10/10, 12/12) always fall on the same weekday in any year. In 2026 that weekday is Saturday.
Frequently asked questions
What day was 1 January 2000?
A Saturday.
Updated October 2026 · Built and tested by Sharjeel Tahir · How our tools are tested