Week Numbers 2026
2026 has 53 ISO weeks. A week belongs to the year that owns its Thursday, which is why some years have 53 and why the first days of January can fall in the last week of the year before.
| Week | Monday | Sunday |
|---|---|---|
| 1 | Mon, December 29, 2025 | Sun, January 4, 2026 |
| 2 | Mon, January 5, 2026 | Sun, January 11, 2026 |
| 3 | Mon, January 12, 2026 | Sun, January 18, 2026 |
| 4 | Mon, January 19, 2026 | Sun, January 25, 2026 |
| 5 | Mon, January 26, 2026 | Sun, February 1, 2026 |
| 6 | Mon, February 2, 2026 | Sun, February 8, 2026 |
| 7 | Mon, February 9, 2026 | Sun, February 15, 2026 |
| 8 | Mon, February 16, 2026 | Sun, February 22, 2026 |
| 9 | Mon, February 23, 2026 | Sun, March 1, 2026 |
| 10 | Mon, March 2, 2026 | Sun, March 8, 2026 |
| 11 | Mon, March 9, 2026 | Sun, March 15, 2026 |
| 12 | Mon, March 16, 2026 | Sun, March 22, 2026 |
| 13 | Mon, March 23, 2026 | Sun, March 29, 2026 |
| 14 | Mon, March 30, 2026 | Sun, April 5, 2026 |
| 15 | Mon, April 6, 2026 | Sun, April 12, 2026 |
| 16 | Mon, April 13, 2026 | Sun, April 19, 2026 |
| 17 | Mon, April 20, 2026 | Sun, April 26, 2026 |
| 18 | Mon, April 27, 2026 | Sun, May 3, 2026 |
| 19 | Mon, May 4, 2026 | Sun, May 10, 2026 |
| 20 | Mon, May 11, 2026 | Sun, May 17, 2026 |
| 21 | Mon, May 18, 2026 | Sun, May 24, 2026 |
| 22 | Mon, May 25, 2026 | Sun, May 31, 2026 |
| 23 | Mon, June 1, 2026 | Sun, June 7, 2026 |
| 24 | Mon, June 8, 2026 | Sun, June 14, 2026 |
| 25 | Mon, June 15, 2026 | Sun, June 21, 2026 |
| 26 | Mon, June 22, 2026 | Sun, June 28, 2026 |
| 27 | Mon, June 29, 2026 | Sun, July 5, 2026 |
| 28 | Mon, July 6, 2026 | Sun, July 12, 2026 |
| 29 | Mon, July 13, 2026 | Sun, July 19, 2026 |
| 30 | Mon, July 20, 2026 | Sun, July 26, 2026 |
| 31 | Mon, July 27, 2026 | Sun, August 2, 2026 |
| 32 | Mon, August 3, 2026 | Sun, August 9, 2026 |
| 33 | Mon, August 10, 2026 | Sun, August 16, 2026 |
| 34 | Mon, August 17, 2026 | Sun, August 23, 2026 |
| 35 | Mon, August 24, 2026 | Sun, August 30, 2026 |
| 36 | Mon, August 31, 2026 | Sun, September 6, 2026 |
| 37 | Mon, September 7, 2026 | Sun, September 13, 2026 |
| 38 | Mon, September 14, 2026 | Sun, September 20, 2026 |
| 39 | Mon, September 21, 2026 | Sun, September 27, 2026 |
| 40 | Mon, September 28, 2026 | Sun, October 4, 2026 |
| 41 | Mon, October 5, 2026 | Sun, October 11, 2026 |
| 42 | Mon, October 12, 2026 | Sun, October 18, 2026 |
| 43 | Mon, October 19, 2026 | Sun, October 25, 2026 |
| 44 | Mon, October 26, 2026 | Sun, November 1, 2026 |
| 45 | Mon, November 2, 2026 | Sun, November 8, 2026 |
| 46 | Mon, November 9, 2026 | Sun, November 15, 2026 |
| 47 | Mon, November 16, 2026 | Sun, November 22, 2026 |
| 48 | Mon, November 23, 2026 | Sun, November 29, 2026 |
| 49 | Mon, November 30, 2026 | Sun, December 6, 2026 |
| 50 | Mon, December 7, 2026 | Sun, December 13, 2026 |
| 51 | Mon, December 14, 2026 | Sun, December 20, 2026 |
| 52 | Mon, December 21, 2026 | Sun, December 27, 2026 |
| 53 | Mon, December 28, 2026 | Sun, January 3, 2027 |
What the week numbers mean
These are ISO 8601 weeks: every week runs Monday to Sunday and belongs to the year that owns its Thursday. It is why 1 January 2027 falls in week 53 of 2026, and why a year has 53 weeks whenever it starts on a Thursday or is a leap year starting on a Wednesday. The US business convention of numbering from 1 January gives different answers, and payroll systems disagree about which one they mean.