Current week number
Find this week's ISO number and week-year.
What it means
Find this week's ISO number and week-year.
How to calculate or use it
Use Monday as day one and assign week 1 to the week containing January 4.
Important details
Dates near New Year can belong to the adjacent ISO week-year.
Related weeks guides
- ISO week dates explained — Read dates written as week-year, week number and weekday.
- How many weeks are in a year? — Understand why ISO years contain 52 or 53 weeks.
- Weeks between two dates — Measure a date interval in complete or fractional weeks.