📆Day of the Week Finder

Find what day of the week any date falls on — past or future.

Select Any Date

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Sunday

Sunday, April 5, 2026

Weekend

Day of Year

Week of Year

Day Index

Sun

Mon

Tue

Wed

Thu

Fri

Sat

About Day of the Week Finder

Instantly find what day of the week any date falls on — whether it was a Monday in 1776 or what day a birthday falls on in 2050. The day of the week finder uses the Zeller algorithm to return accurate results for any Gregorian calendar date, past or future.

How to Use Day of the Week Finder

1
Step 1
Enter the date you want to look up (any year, month, and day).
2
Step 2
Click Find to instantly see what day of the week that date falls on.
3
Step 3
Use the result to plan events or satisfy historical curiosity.

Common Use Cases

Finding what day of the week a birthday, anniversary, or historical event fell on
Planning a future event date by checking which weekday it lands on
Historical research verifying the day of the week for significant dates
Trivia and fun facts about birth days and notable dates in history

Frequently Asked Questions

How far back or forward can it calculate?

The calculator works for any Gregorian calendar date from the year 1582 onward (when the Gregorian calendar was adopted) and into the indefinite future.

Can I find what day my birthday falls on in a future year?

Yes. Enter any future date to instantly see what day of the week it falls on, perfect for planning birthday celebrations.

Does it account for the calendar switch from Julian to Gregorian?

The tool operates on the Gregorian calendar system. Dates before October 1582 may differ from the Julian calendar that was in use at that time.