Week numbers for 2027
Complete ISO week-number calendar for 2027, with the Monday-to-Sunday date range for every week and links to detailed weekly schedules.
All 52 ISO weeks
Week 1Jan 4–10, 2027Week 2Jan 11–17, 2027Week 3Jan 18–24, 2027Week 4Jan 25–31, 2027Week 5Feb 1–7, 2027Week 6Feb 8–14, 2027Week 7Feb 15–21, 2027Week 8Feb 22–28, 2027Week 9Mar 1–7, 2027Week 10Mar 8–14, 2027Week 11Mar 15–21, 2027Week 12Mar 22–28, 2027Week 13Mar 29–Apr 4, 2027Week 14Apr 5–11, 2027Week 15Apr 12–18, 2027Week 16Apr 19–25, 2027Week 17Apr 26–May 2, 2027Week 18May 3–9, 2027Week 19May 10–16, 2027Week 20May 17–23, 2027Week 21May 24–30, 2027Week 22May 31–Jun 6, 2027Week 23Jun 7–13, 2027Week 24Jun 14–20, 2027Week 25Jun 21–27, 2027Week 26Jun 28–Jul 4, 2027Week 27Jul 5–11, 2027Week 28Jul 12–18, 2027Week 29Jul 19–25, 2027Week 30Jul 26–Aug 1, 2027Week 31Aug 2–8, 2027Week 32Aug 9–15, 2027Week 33Aug 16–22, 2027Week 34Aug 23–29, 2027Week 35Aug 30–Sep 5, 2027Week 36Sep 6–12, 2027Week 37Sep 13–19, 2027Week 38Sep 20–26, 2027Week 39Sep 27–Oct 3, 2027Week 40Oct 4–10, 2027Week 41Oct 11–17, 2027Week 42Oct 18–24, 2027Week 43Oct 25–31, 2027Week 44Nov 1–7, 2027Week 45Nov 8–14, 2027Week 46Nov 15–21, 2027Week 47Nov 22–28, 2027Week 48Nov 29–Dec 5, 2027Week 49Dec 6–12, 2027Week 50Dec 13–19, 2027Week 51Dec 20–26, 2027Week 52Dec 27, 2027–Jan 2, 2028
Using the 2027 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; 2027 has 52 ISO weeks.