What Week Number Is It? ISO Week Today
Today's ISO week number, which is what most calendars, planners and payroll systems in Europe use.
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🔥 Trending today
- Mon Oct 12: Columbus Day (United States) – today
- Mon Oct 12: Nossa Senhora Aparecida (Brazil) – today
- Mon Oct 12: スポーツの日 (Japan) – today
- Tue Oct 20: Dussehra (India) – 8 days
- Sun Nov 1: Toussaint (France) – 20 days
- Mon Nov 2: Finados (Brazil) – 21 days
- 2026 is day 285 of 365 today, ISO week 42. “What is today” gets about 11 million US searches a month.
Good to know
ISO weeks start on Monday, and week 1 is the week with the year's first Thursday. That's why January 1 sometimes falls in week 52 or 53 of the previous year.
Frequently asked questions
How many weeks are in 2026?
2026 has 53 ISO weeks because it starts on a Thursday.
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