What is the current week number?
The current week number is 38 of 2026.
Content reviewed 2026-08-21.
Current week dates
ISO week 38 of 2026 starts on Monday 14 September 2026 and ends on Sunday 20 September 2026. Open the detailed week 38 calendar (in Finnish) for individual dates and Finnish holidays.
How ISO week numbers work
ISO 8601 numbers weeks from 1 to 52 or 53. Weeks start on Monday. Week 1 is the week containing the first Thursday of the year, which means dates near New Year can belong to a different ISO week-year.
Frequently asked questions
What is the current week number?
The answer at the top of this page is calculated from the current date using the ISO 8601 week-date system.
When does the week start?
Under ISO 8601, each week starts on Monday and ends on Sunday.
How is week 1 determined?
Week 1 is the week containing the year's first Thursday. Equivalently, it is the week containing 4 January.
Can an early-January date belong to the previous week-year?
Yes. Around New Year, an ISO week-year can differ from the calendar year.
The full service is available in Finnish: current week, all weeks in 2026 and the 2026 calendar.