See which week of the year any date belongs to, as used in business planning, school timetables and payroll. Get the ISO week (weeks start Monday, used in Europe and India), the US-style week and the dates of that week.
loading toolHow to find the week number
- Pick a date (today is filled in).
- Read the week number.
- See that week’s Monday-to-Sunday dates and the US week number.
Questions
Why is 1 January sometimes in week 52 or 53?
ISO week 1 is the week with the year’s first Thursday. If 1 January is a Friday, Saturday or Sunday, it still belongs to the last week of the year before.
Which years have 53 weeks?
Years that start on a Thursday, or leap years that start on a Wednesday, for example 2020 and 2026.
Is my data private?
Yes. Everything happens inside your own browser: nothing you type or choose is uploaded to us or anyone else.
Is it free?
Completely free, with no sign-up, no watermark and no limit on how many times you use it. Light ads keep the site running.
