What Day Was This Date: Find the Weekday of Any Date

What is it?

What Day Was This Date finds the weekday of any Date, past or future, and how far it is from today.

Who is it for?

Students with history homework, people checking dates on documents, families planning anniversaries, and anyone curious about the day they were born.

How to use it

Pick the date. It also lists The same day in coming years (birthdays, anniversaries), so you can see which years a birthday falls on a weekend.

Uses

The day you were born (the Birthday Calculator adds more fun facts).
Planning a wedding, party or trip on a weekend.
Checking whether a due date or holiday falls on a Sunday.
History homework: what day a famous event happened.

Very old dates

Dates are shown on the Gregorian calendar we use today, extended backwards. Countries switched from the older Julian calendar at different times (Britain and its colonies in 1752), so historical records before then may show a different weekday.

Worked examples

15 August 1947 was a Friday.
26 January 1950, when India’s Constitution came into force, was a Thursday.
1 January 2000 was a Saturday.

How the weekday repeats

A date moves forward one weekday each year, or two after 29 February. If your birthday is on Monday this year, it’s on Tuesday next year (Wednesday if a leap day falls in between).
The whole calendar of a year repeats every few years (6, 11 or 28 years apart, depending on leap years), which is why old calendars can sometimes be reused.

More uses

Checking a date of birth on a form, or the day on an old certificate.
Finding the day for a date in a contract or a court notice.

Errors and how to fix them

Old dates disagree with records: before the Gregorian calendar was adopted, records used the Julian calendar.

Open the tool: What Day Was This Date

Still stuck?

Contact support. Tell us which tool or page you were using, what you tapped, what you saw, and your phone or computer and browser (for example: Android phone, Chrome). We reply by email.