About the Week
The 7-day week is the international standard for timekeeping.
- Work week: Typically Monday to Friday.
- Weekend: Saturday and Sunday.
- ISO 8601: Monday is the first day of the week.
- US/Canada/Japan: Sunday is traditionally the first day.
FAQ
How do you calculate the day of the week?
We use the standard Gregorian calendar system. Algorithms like Zeller's congruence are often used mathematically.
What day was I born?
Enter your birthdate above to find out exactly which day of the week you were born on.
Does it work for future dates?
Yes, you can find out what day Christmas falls on in 2050!