How to use it
- Choose monthly pages or a year on one page.
- Keep Monday as the first day so rows match ISO weeks.
- Download and print.
How ISO week numbers work
Weeks run Monday to Sunday. Week 1 is the week with the year's first Thursday, so 1 January can fall in week 52 or 53 of the previous year. 2026 has 53 weeks; 1 January 2027 belongs to week 53 of 2026.
Sunday start
If you start weeks on Sunday, the number shown for each row is the ISO week of that row's Monday.
Questions
Do the US and Europe number weeks the same way?
Not always. ISO 8601 is used in most of Europe. Some US software counts week 1 as the week containing 1 January, starting on Sunday, which can differ by one.
How many weeks are in a year?
52 or 53. A year has 53 ISO weeks when it starts on a Thursday, or is a leap year starting on a Wednesday.