Day of the Week Calculator
Day of the week —
Weekday or weekend? —
Based on the Gregorian calendar, which is what every modern calculator and calendar app uses — accurate for any date this tool's date picker allows.
Free day-of-the-week calculator — enter any date, past or future, and instantly see which day of the week it falls (or fell) on, plus whether it's a weekday or weekend.
How it works
- Enter any date, past or future
- See which day of the week it falls on
- See whether it's a weekday or weekend
Frequently asked questions
What day was I born?
Enter your birth date to see the day of the week you were born on — a common curiosity, since most people don't know it off-hand.
How far into the past or future does this work?
As far as your browser's date picker allows — this uses the standard Gregorian calendar, the same one every modern calendar app uses.
Related tools
From the blog
Update history
- 2026-09-01 Launched: day-of-the-week calculator for any past or future date, with a weekday/weekend indicator. Entirely client-side.