Week numbers 2026
All 53 ISO weeks of 2026 with their exact dates. 2026 starts on a Thursday, has 365 days, and counts 53 calendar weeks. Week 1 begins Dec 29, 2025; week 53 ends Jan 3, 2027.
Right now it is week 29 of 2026 (Jul 13 – Jul 19, 2026) — highlighted in the chart below.
Week number chart 2026
| Week number | From (Monday) | To (Sunday) | Month | Quarter |
|---|---|---|---|---|
| Week 1 | Dec 29, 2025 | Jan 4 | Dec / Jan | Q1 |
| Week 2 | Jan 5 | Jan 11 | January | Q1 |
| Week 3 | Jan 12 | Jan 18 | January | Q1 |
| Week 4 | Jan 19 | Jan 25 | January | Q1 |
| Week 5 | Jan 26 | Feb 1 | Jan / Feb | Q1 |
| Week 6 | Feb 2 | Feb 8 | February | Q1 |
| Week 7 | Feb 9 | Feb 15 | February | Q1 |
| Week 8 | Feb 16 | Feb 22 | February | Q1 |
| Week 9 | Feb 23 | Mar 1 | Feb / Mar | Q1 |
| Week 10 | Mar 2 | Mar 8 | March | Q1 |
| Week 11 | Mar 9 | Mar 15 | March | Q1 |
| Week 12 | Mar 16 | Mar 22 | March | Q1 |
| Week 13 | Mar 23 | Mar 29 | March | Q1 |
| Week 14 | Mar 30 | Apr 5 | Mar / Apr | Q2 |
| Week 15 | Apr 6 | Apr 12 | April | Q2 |
| Week 16 | Apr 13 | Apr 19 | April | Q2 |
| Week 17 | Apr 20 | Apr 26 | April | Q2 |
| Week 18 | Apr 27 | May 3 | Apr / May | Q2 |
| Week 19 | May 4 | May 10 | May | Q2 |
| Week 20 | May 11 | May 17 | May | Q2 |
| Week 21 | May 18 | May 24 | May | Q2 |
| Week 22 | May 25 | May 31 | May | Q2 |
| Week 23 | Jun 1 | Jun 7 | June | Q2 |
| Week 24 | Jun 8 | Jun 14 | June | Q2 |
| Week 25 | Jun 15 | Jun 21 | June | Q2 |
| Week 26 | Jun 22 | Jun 28 | June | Q2 |
| Week 27 | Jun 29 | Jul 5 | Jun / Jul | Q3 |
| Week 28 | Jul 6 | Jul 12 | July | Q3 |
| Week 29 Now | Jul 13 | Jul 19 | July | Q3 |
| Week 30 | Jul 20 | Jul 26 | July | Q3 |
| Week 31 | Jul 27 | Aug 2 | Jul / Aug | Q3 |
| Week 32 | Aug 3 | Aug 9 | August | Q3 |
| Week 33 | Aug 10 | Aug 16 | August | Q3 |
| Week 34 | Aug 17 | Aug 23 | August | Q3 |
| Week 35 | Aug 24 | Aug 30 | August | Q3 |
| Week 36 | Aug 31 | Sep 6 | Aug / Sep | Q3 |
| Week 37 | Sep 7 | Sep 13 | September | Q3 |
| Week 38 | Sep 14 | Sep 20 | September | Q3 |
| Week 39 | Sep 21 | Sep 27 | September | Q3 |
| Week 40 | Sep 28 | Oct 4 | Sep / Oct | Q4 |
| Week 41 | Oct 5 | Oct 11 | October | Q4 |
| Week 42 | Oct 12 | Oct 18 | October | Q4 |
| Week 43 | Oct 19 | Oct 25 | October | Q4 |
| Week 44 | Oct 26 | Nov 1 | Oct / Nov | Q4 |
| Week 45 | Nov 2 | Nov 8 | November | Q4 |
| Week 46 | Nov 9 | Nov 15 | November | Q4 |
| Week 47 | Nov 16 | Nov 22 | November | Q4 |
| Week 48 | Nov 23 | Nov 29 | November | Q4 |
| Week 49 | Nov 30 | Dec 6 | Nov / Dec | Q4 |
| Week 50 | Dec 7 | Dec 13 | December | Q4 |
| Week 51 | Dec 14 | Dec 20 | December | Q4 |
| Week 52 | Dec 21 | Dec 27 | December | Q4 |
| Week 53 | Dec 28 | Jan 3, 2027 | Dec / Jan | Q4 |
Note that week 1 of 2026 starts on Dec 29, 2025 — the last days of December 2025 belong to 2026's week 1 under ISO rules. The final week, week 53, runs into 2027: it ends on Jan 3, 2027. Weeks follow ISO 8601 (Monday start, week 1 contains January 4).
Other years
Frequently asked questions
How many weeks does 2026 have?
2026 has 53 ISO weeks. It is one of the rare 53-week years — the next ones are 2032, 2037.
When does week 1 of 2026 start?
Week 1 of 2026 runs from Monday, Dec 29, 2025 to Sunday, Jan 4, 2026 — it is the week containing January 4. 2026 itself begins on a Thursday.
When does the last week of 2026 end?
Week 53, the final week of 2026, runs from Dec 28, 2026 to Jan 3, 2027.
Is 2026 a leap year?
No — 2026 has 365 days, which is 52 weeks and 1 day.