Week numbers for 2025
Complete ISO week-number calendar for 2025, with the Monday-to-Sunday date range for every week and links to detailed weekly schedules.
All 52 ISO weeks
Week 1Dec 30, 2024–Jan 5, 2025Week 2Jan 6–12, 2025Week 3Jan 13–19, 2025Week 4Jan 20–26, 2025Week 5Jan 27–Feb 2, 2025Week 6Feb 3–9, 2025Week 7Feb 10–16, 2025Week 8Feb 17–23, 2025Week 9Feb 24–Mar 2, 2025Week 10Mar 3–9, 2025Week 11Mar 10–16, 2025Week 12Mar 17–23, 2025Week 13Mar 24–30, 2025Week 14Mar 31–Apr 6, 2025Week 15Apr 7–13, 2025Week 16Apr 14–20, 2025Week 17Apr 21–27, 2025Week 18Apr 28–May 4, 2025Week 19May 5–11, 2025Week 20May 12–18, 2025Week 21May 19–25, 2025Week 22May 26–Jun 1, 2025Week 23Jun 2–8, 2025Week 24Jun 9–15, 2025Week 25Jun 16–22, 2025Week 26Jun 23–29, 2025Week 27Jun 30–Jul 6, 2025Week 28Jul 7–13, 2025Week 29Jul 14–20, 2025Week 30Jul 21–27, 2025Week 31Jul 28–Aug 3, 2025Week 32Aug 4–10, 2025Week 33Aug 11–17, 2025Week 34Aug 18–24, 2025Week 35Aug 25–31, 2025Week 36Sep 1–7, 2025Week 37Sep 8–14, 2025Week 38Sep 15–21, 2025Week 39Sep 22–28, 2025Week 40Sep 29–Oct 5, 2025Week 41Oct 6–12, 2025Week 42Oct 13–19, 2025Week 43Oct 20–26, 2025Week 44Oct 27–Nov 2, 2025Week 45Nov 3–9, 2025Week 46Nov 10–16, 2025Week 47Nov 17–23, 2025Week 48Nov 24–30, 2025Week 49Dec 1–7, 2025Week 50Dec 8–14, 2025Week 51Dec 15–21, 2025Week 52Dec 22–28, 2025
Using the 2025 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; 2025 has 52 ISO weeks.