When is week 39?
Week 39 of 2027: Sep 27 – Oct 3
Mon, Sep 27 – Sun, Oct 3, 2027
Week 39 of 2026 ended on Sunday, September 27, 2026, so this is next year's. It starts in 362 days.
Week 39 by year
More week numbers
Frequently asked questions
When is week 39 of 2027?
From Monday, September 27, 2027 to Sunday, October 3, 2027.
How many days until week 39?
362 days, counting from today to Monday, the first day of the week.
Why can week 1 start in December?
ISO week 1 is the week containing the year's first Thursday, so it can begin as early as December 29 of the previous year.