Week numbers for 2026
Complete ISO week-number calendar for 2026, with the Monday-to-Sunday date range for every week and links to detailed weekly schedules.
All 53 ISO weeks
Week 1Dec 29, 2025–Jan 4, 2026Week 2Jan 5–11, 2026Week 3Jan 12–18, 2026Week 4Jan 19–25, 2026Week 5Jan 26–Feb 1, 2026Week 6Feb 2–8, 2026Week 7Feb 9–15, 2026Week 8Feb 16–22, 2026Week 9Feb 23–Mar 1, 2026Week 10Mar 2–8, 2026Week 11Mar 9–15, 2026Week 12Mar 16–22, 2026Week 13Mar 23–29, 2026Week 14Mar 30–Apr 5, 2026Week 15Apr 6–12, 2026Week 16Apr 13–19, 2026Week 17Apr 20–26, 2026Week 18Apr 27–May 3, 2026Week 19May 4–10, 2026Week 20May 11–17, 2026Week 21May 18–24, 2026Week 22May 25–31, 2026Week 23Jun 1–7, 2026Week 24Jun 8–14, 2026Week 25Jun 15–21, 2026Week 26Jun 22–28, 2026Week 27Jun 29–Jul 5, 2026Week 28Jul 6–12, 2026Week 29Jul 13–19, 2026Week 30Jul 20–26, 2026Week 31Jul 27–Aug 2, 2026Week 32Aug 3–9, 2026Week 33Aug 10–16, 2026Week 34Aug 17–23, 2026Week 35Aug 24–30, 2026Week 36Aug 31–Sep 6, 2026Week 37Sep 7–13, 2026Week 38Sep 14–20, 2026Week 39Sep 21–27, 2026Week 40Sep 28–Oct 4, 2026Week 41Oct 5–11, 2026Week 42Oct 12–18, 2026Week 43Oct 19–25, 2026Week 44Oct 26–Nov 1, 2026Week 45Nov 2–8, 2026Week 46Nov 9–15, 2026Week 47Nov 16–22, 2026Week 48Nov 23–29, 2026Week 49Nov 30–Dec 6, 2026Week 50Dec 7–13, 2026Week 51Dec 14–20, 2026Week 52Dec 21–27, 2026Week 53Dec 28, 2026–Jan 3, 2027
Using the 2026 week calendar
Each week page shows its exact seven dates, ISO code, day-of-year range and calendar actions. ISO weeks run Monday through Sunday; 2026 has 53 ISO weeks.