Date lookup
Week Numbers 2026
Get all week numbers for 2026 with start and end dates in ISO or US week systems.
Week numbers in 2026
Includes week start, end, and number of in-year days.
| Week | Start date | End date | In-year days |
|---|---|---|---|
| 1 | 2025-12-29 | 2026-01-04 | 4 |
| 2 | 2026-01-05 | 2026-01-11 | 7 |
| 3 | 2026-01-12 | 2026-01-18 | 7 |
| 4 | 2026-01-19 | 2026-01-25 | 7 |
| 5 | 2026-01-26 | 2026-02-01 | 7 |
| 6 | 2026-02-02 | 2026-02-08 | 7 |
| 7 | 2026-02-09 | 2026-02-15 | 7 |
| 8 | 2026-02-16 | 2026-02-22 | 7 |
| 9 | 2026-02-23 | 2026-03-01 | 7 |
| 10 | 2026-03-02 | 2026-03-08 | 7 |
| 11 | 2026-03-09 | 2026-03-15 | 7 |
| 12 | 2026-03-16 | 2026-03-22 | 7 |
| 13 | 2026-03-23 | 2026-03-29 | 7 |
| 14 | 2026-03-30 | 2026-04-05 | 7 |
| 15 | 2026-04-06 | 2026-04-12 | 7 |
| 16 | 2026-04-13 | 2026-04-19 | 7 |
| 17 | 2026-04-20 | 2026-04-26 | 7 |
| 18 | 2026-04-27 | 2026-05-03 | 7 |
| 19 | 2026-05-04 | 2026-05-10 | 7 |
| 20 | 2026-05-11 | 2026-05-17 | 7 |
| 21 | 2026-05-18 | 2026-05-24 | 7 |
| 22 | 2026-05-25 | 2026-05-31 | 7 |
| 23 | 2026-06-01 | 2026-06-07 | 7 |
| 24 | 2026-06-08 | 2026-06-14 | 7 |
| 25 | 2026-06-15 | 2026-06-21 | 7 |
| 26 | 2026-06-22 | 2026-06-28 | 7 |
| 27 | 2026-06-29 | 2026-07-05 | 7 |
| 28 | 2026-07-06 | 2026-07-12 | 7 |
| 29 | 2026-07-13 | 2026-07-19 | 7 |
| 30 | 2026-07-20 | 2026-07-26 | 7 |
| 31 | 2026-07-27 | 2026-08-02 | 7 |
| 32 | 2026-08-03 | 2026-08-09 | 7 |
| 33 | 2026-08-10 | 2026-08-16 | 7 |
| 34 | 2026-08-17 | 2026-08-23 | 7 |
| 35 | 2026-08-24 | 2026-08-30 | 7 |
| 36 | 2026-08-31 | 2026-09-06 | 7 |
| 37 | 2026-09-07 | 2026-09-13 | 7 |
| 38 | 2026-09-14 | 2026-09-20 | 7 |
| 39 | 2026-09-21 | 2026-09-27 | 7 |
| 40 | 2026-09-28 | 2026-10-04 | 7 |
| 41 | 2026-10-05 | 2026-10-11 | 7 |
| 42 | 2026-10-12 | 2026-10-18 | 7 |
| 43 | 2026-10-19 | 2026-10-25 | 7 |
| 44 | 2026-10-26 | 2026-11-01 | 7 |
| 45 | 2026-11-02 | 2026-11-08 | 7 |
| 46 | 2026-11-09 | 2026-11-15 | 7 |
| 47 | 2026-11-16 | 2026-11-22 | 7 |
| 48 | 2026-11-23 | 2026-11-29 | 7 |
| 49 | 2026-11-30 | 2026-12-06 | 7 |
| 50 | 2026-12-07 | 2026-12-13 | 7 |
| 51 | 2026-12-14 | 2026-12-20 | 7 |
| 52 | 2026-12-21 | 2026-12-27 | 7 |
| 53 | 2026-12-28 | 2027-01-03 | 4 |
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