Find what day of the week a date falls on
Find out what day of the week any past or future date falls on.
Calculated in your browser. Nothing you enter is sent to a server.
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Date
Enter a date to find its day of the week.
01
Enter a date
Any date, past or future.
02
Read the day of the week
Shown as the headline, e.g. 'Friday'.
03
Check the extras
The full date, its day-of-year number, and its ISO week number.
Frequently asked
How far back or forward can I check?
Any date your browser's date picker allows. There's no practical range limit.
What is the ISO week number?
The standard ISO-8601 week number, where weeks start on Monday and week 1 is the week containing the year's first Thursday. It's the numbering used on most European calendars.
What is day-of-year?
The date's position within its calendar year, from 1 (1 January) to 365 or 366 (31 December, depending on leap years).