Day of the Week Finder
Find what day of the week any date fell — or will fall — on.
Last updated
Pick a date above.
—Day of the year
—ISO weekday (1=Mon)
—Weekend?
—From today
About this tool
The Gregorian calendar repeats its weekday pattern on a 400-year cycle, so this works the same way for a date centuries in the past or future as it does for next week — there's no special-casing, just calendar-day arithmetic done consistently with UTC dates so the result doesn't depend on your time zone.
Nothing entered here is sent to a server — the entire calculation runs as JavaScript in your browser tab.