Day of the week calculator
Find out which day of the week any date fell or will fall on, such as the day you were born, and see which weekday your birthday will be in the coming years.
What day of the week was I born?
Available in: 
Day of the week calculator: what it is for
Enter any date, past or future, to find the day of the week and how many days ago it was or how many days are left. The table shows the weekday of your birthday in the coming years, highlighting the ones that fall on a weekend.
How to use
- Enter the date.
- See the day of the week.
- Check your next birthdays.
When to use it
- Finding out the day you were born.
- Planning a party on a weekend.
- Checking historical dates.
Frequently asked questions
Does it work for old dates?
Yes. The tool uses the Gregorian calendar, introduced in 1582, and works for past and future dates.
Why does my birthday change weekday?
A regular year has 365 days, or 52 weeks and 1 day. So your birthday moves forward one weekday each year, and two when it passes a February 29.
Is it really free?
Yes, 100% free. No sign-up, no subscription and no usage limits. All Tools123 tools are free and run right in your browser.