Which calendar does this calculator use?

It uses the Gregorian calendar, the civil calendar used by most of the world today.

Can I find the weekday for a past date?

Yes. Select a valid past date and the calculator returns its Gregorian weekday.

Does it work for future dates?

Yes. The same Gregorian weekday calculation works for valid future dates.

Are leap years handled correctly?

Yes. Gregorian leap-year rules are included, so dates such as February 29 receive the correct weekday.

Can my timezone change the result?

No. The selected value is treated as a calendar date rather than a local timestamp, so timezone changes do not shift it to another day.

Date & Time Calculators

Day of the Week Calculator

Find the weekday for any date in the Gregorian calendar.

Free browser toolRuns in your browserNo sign-up

Select a date

Select a date to find its day of the week.

About the Day of the Week Calculator

The Day of the Week Calculator identifies the weekday for any selected Gregorian calendar date. Choose a date and the result appears instantly with its full formatted date.

It works for past, present and future dates, including leap days. Date-only UTC arithmetic keeps the selected calendar date stable across local timezones and daylight-saving changes.

The Gregorian calendar has a repeating seven-day week. This calculator applies that calendar directly, so 19 August 2026 correctly returns Wednesday.

All calculations run locally in the browser. The selected date is not uploaded or stored.

Key features

Weekday name for any selected date
Full formatted date information
Gregorian calendar calculation
Past and future date support

How to use

1Select a date using the date field.
2Read the weekday name in the result panel.
3Use the full date below the weekday to confirm your selection.

Examples

Weekday of a date

Input: 2000-01-01

Output: Saturday

The tool works out which day of the week that date fell on.

Frequently asked questions

Which calendar does this calculator use?: It uses the Gregorian calendar, the civil calendar used by most of the world today.
Can I find the weekday for a past date?: Yes. Select a valid past date and the calculator returns its Gregorian weekday.
Does it work for future dates?: Yes. The same Gregorian weekday calculation works for valid future dates.
Are leap years handled correctly?: Yes. Gregorian leap-year rules are included, so dates such as February 29 receive the correct weekday.
Can my timezone change the result?: No. The selected value is treated as a calendar date rather than a local timestamp, so timezone changes do not shift it to another day.

Open a related tool to prepare your files or refine the finished result.