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Day of Week Calculator

Find what day of the week any date falls on.

Thursday
28 May 2026
Thursday
Day of Week
5 / 7
Day Number (Sun=1)
148
Day of Year
217
Days Left in Year
Week 22
Approx. Week Number
Weekday
Type
No (365 days)
Leap Year
5 / 12
Month Number

About This Tool

The Day of Week Calculator tells you what day of the week any date falls on, along with additional calendar facts: day number within the year, days remaining in the year, week number, whether it is a weekday or weekend, and whether the year is a leap year.

All calculations happen instantly in your browser using JavaScript's native Date API. No data is sent to any server.

How to Use

  1. Select any date using the date picker.
  2. All calendar facts update instantly β€” no button required.

Use Cases

Historians verify what day of the week a historical event occurred. HR managers check whether a specific date is a weekday for payroll. Content creators plan publication dates around weekdays for better engagement.

FAQ

  • What calendar system is used? β€” The Gregorian calendar, which is the internationally accepted civil calendar.
  • Are historical dates (before 1970) supported? β€” Yes. JavaScript's Date object handles dates back to around 100 million days before the Unix epoch.