Day of the Week Calculator
Find the Day of Any Date
Select a date below to calculate which day of the week it falls on.
The day of the week is:
Day Distribution Visualization
How It Works
About the Calculation
This calculator uses Zeller’s Congruence algorithm to determine the day of the week for any given date in the Gregorian calendar.
The algorithm takes into account the day, month, and year, and performs a series of calculations to determine the day of the week (where 0 = Saturday, 1 = Sunday, 2 = Monday, etc.).
Interesting Facts
- The Gregorian calendar was introduced in 1582 by Pope Gregory XIII.
- February has 28 days in common years and 29 days in leap years.
- There are 14 possible calendar patterns in the Gregorian calendar.
- The concept of a 7-day week dates back to ancient Babylon.