Week number
The current week number, the week of any date, and a full list of weeks for the year.
This week is
Week 44Oct 26, 2026 – Nov 1, 2026 · 2026
Find the week of a date
Week 44 of 2026Oct 26, 2026 – Nov 1, 2026
Weeks in 2026
2026 has 53 weeks in the ISO 8601 (Monday start) system.
- W112/29/25 – 1/4/26
- W21/5/26 – 1/11/26
- W31/12/26 – 1/18/26
- W41/19/26 – 1/25/26
- W51/26/26 – 2/1/26
- W62/2/26 – 2/8/26
- W72/9/26 – 2/15/26
- W82/16/26 – 2/22/26
- W92/23/26 – 3/1/26
- W103/2/26 – 3/8/26
- W113/9/26 – 3/15/26
- W123/16/26 – 3/22/26
- W133/23/26 – 3/29/26
- W143/30/26 – 4/5/26
- W154/6/26 – 4/12/26
- W164/13/26 – 4/19/26
- W174/20/26 – 4/26/26
- W184/27/26 – 5/3/26
- W195/4/26 – 5/10/26
- W205/11/26 – 5/17/26
- W215/18/26 – 5/24/26
- W225/25/26 – 5/31/26
- W236/1/26 – 6/7/26
- W246/8/26 – 6/14/26
- W256/15/26 – 6/21/26
- W266/22/26 – 6/28/26
- W276/29/26 – 7/5/26
- W287/6/26 – 7/12/26
- W297/13/26 – 7/19/26
- W307/20/26 – 7/26/26
- W317/27/26 – 8/2/26
- W328/3/26 – 8/9/26
- W338/10/26 – 8/16/26
- W348/17/26 – 8/23/26
- W358/24/26 – 8/30/26
- W368/31/26 – 9/6/26
- W379/7/26 – 9/13/26
- W389/14/26 – 9/20/26
- W399/21/26 – 9/27/26
- W409/28/26 – 10/4/26
- W4110/5/26 – 10/11/26
- W4210/12/26 – 10/18/26
- W4310/19/26 – 10/25/26
- W4410/26/26 – 11/1/26
- W4511/2/26 – 11/8/26
- W4611/9/26 – 11/15/26
- W4711/16/26 – 11/22/26
- W4811/23/26 – 11/29/26
- W4911/30/26 – 12/6/26
- W5012/7/26 – 12/13/26
- W5112/14/26 – 12/20/26
- W5212/21/26 – 12/27/26
- W5312/28/26 – 1/3/27
Which week numbering should I use?
Most of Europe and Asia, and most business software, use ISO 8601 weeks. The United States, Canada and some other countries count weeks from Sunday with week 1 starting on 1 January.
Questions and answers
How are ISO week numbers counted?
ISO 8601 weeks start on Monday. Week 1 is the week that contains the first Thursday of the year, so the first days of January can belong to the last week of the previous year.
How do US week numbers differ?
In the US system weeks start on Sunday, and week 1 is the week that contains 1 January.
How many weeks are in a year?
An ISO year has 52 or 53 weeks. Years that start or end on a Thursday have 53.