Day of the Week Calculator
Find what day of the week any date was or will be — birthdays, historical events and future dates. Free.
✓ 100% free ✓ No sign up ✓ Runs in your browser — nothing uploaded
Day of the week
Sunday
Full date Sunday, July 20, 1969
Day of the year 201
How to use Day of the Week Calculator
- 1Enter your numbers or dates.
- 2Results update instantly as you type.
- 3Copy the main result with one click.
Questions
Is Day of the Week Calculator free?
Yes. Day of the Week Calculator is 100% free with no limits, no watermark, no sign up and no email required.
Is my data sent anywhere?
No. Everything is calculated locally in your browser. Nothing you type is sent to or stored on any server.
Does Day of the Week Calculator work on my phone?
Yes. Day of the Week Calculator works in any modern browser on iPhone, Android, Windows, Mac, Linux and Chromebook. No app or install needed.
Do I need to create an account?
Never. There is no sign up, no login, no email and no paywall. Just open the page and use it.
How accurate is it?
Calculations use standard formulas with full floating-point precision. For medical, legal or financial decisions, please confirm with a professional.