Weekday Calculator

Pick any date to see its weekday, ISO week, day of year, leap-year status and weekend check.

Calendar details
Weekday
Full date
Day type
ISO week
Day of year
Days left in year
Day of month
Year type
Pick a date — the weekday and calendar details update instantly.

The date is checked in your browser. Nothing you enter is uploaded to BroBroGo.

FAQ

Can it check old or future dates?

Yes — dates from years 1 to 9999 are supported. For very old historical dates, the result uses today’s Gregorian calendar rules all the way back, while local calendars at the time may have differed.

What counts as a weekend?

Saturday and Sunday are marked as weekend days. Public holidays are not included here; use the Business Days Calculator when you need custom working days and holidays.

Why show the ISO week too?

Many planners and spreadsheets group dates by ISO week, where weeks run Monday to Sunday and belong to the year containing their Thursday. Showing it next to the weekday makes scheduling easier.

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