Calendar

Day of the week calculator

Find the weekday for any date.

Local and private calculation

How it works

Find the weekday for any date.

We normalize civil dates to avoid timezone and daylight-saving errors.

How the weekday is found

Every civil date maps to a specific position in the weekly cycle. The date is normalized without local time to prevent unexpected shifts.

Use it for historical dates, birthdays, anniversaries, deliveries or any event that needs a weekday.

Tips for a useful result

  • Choose the date with the picker to avoid ambiguous formats.
  • Very old dates follow the Gregorian calendar used by the tool.
  • Copy the result when adding it to a schedule or document.

Example

Enter the values and get an instant result.

Frequently asked questions

Is the result exact?

Day and date calculations are exact. Values shown as months, hours or minutes may be approximate where appropriate.

Which parts of the result are exact?

Dates and calendar-day totals are exact. Conversions to months, weeks, hours or minutes may be approximate when there is no single calendar conversion.

Are my dates sent to the server?

No. The calculation runs in your browser, and entered values are not included in server requests or analytics events.

Can my timezone change the result?

The tool uses civil dates without a time and normalizes them internally, avoiding one-day shifts caused by timezones or daylight-saving changes.

Does it work on phones and computers?

Yes. The interface is responsive and uses features supported by modern desktop and mobile browsers.