Day of the Week Calculator
Find which day of the week any date falls on — plus day of the year, week number and leap year.
Result
How to use
- 1
Pick any date — past or future.
- 2
See the weekday, day of the year, ISO week and more.
Questions
How far back does it work?
It uses the Gregorian calendar for all dates. India and Britain switched to it in 1752, so very old dates follow the modern calendar rather than the one used at the time.
How do I know if a year is a leap year?
A year is a leap year if it is divisible by 4 — except century years, which must be divisible by 400. So 2000 was a leap year but 1900 was not, and 2028 is the next one.
About this Day of the Week tool
Day of the Week Calculator — Find which day of the week any date falls on — plus day of the year, week number and leap year. It is one of 200 free tools on namasivayam.in, made by software engineer Namasivayam Vadivelan for everyday use in India.
Everything is calculated instantly in your browser: nothing you type or upload is sent to any server, there is no sign-up, and it works on mobile and desktop. Pick any date — past or future.
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Results are estimates to help you plan. They are not financial, tax or medical advice.