Day of the Week Calculator
Find the day of the week for any date, plus the day of the year, weekend status, and leap-year status.
Independently verified for accuracy
Calculator by Toolsloft ↗- Day of week
- Wednesday
- Day of year
- 189
- Weekend
- No
- Leap year
- No
Find out what day of the week any date falls on, along with its position in the year and whether it lands on a weekend. Enter a past or future date to check a birthday, an event, or a historical date. It also tells you whether the year is a leap year.
How this is calculated
The weekday comes from the date read as a UTC calendar day, which removes any timezone effect. The day of the year is the count from January 1, and the leap-year flag applies the standard rule: divisible by 4, except centuries that are not divisible by 400.
How to use
- Enter the date you want to check.
- Read the weekday name below.
- Check the day-of-year, weekend, and leap-year details.
Examples
- A weekday:
2026-07-08 → Wednesday, day 189 of the year - Leap day:
2024-02-29 → Thursday, in a leap year
FAQ
- Does the tool handle historical dates?
- Yes, using the proleptic Gregorian calendar. It applies today’s calendar rules consistently across all years.
- How is a leap year decided?
- A year is a leap year if it is divisible by 4, except for century years, which must be divisible by 400. So 2000 is a leap year but 1900 is not.
- What does day of the year mean?
- It is the position of the date counting from January 1, which is day 1. December 31 is day 365, or day 366 in a leap year.