Week Numbers 2029
2029 has 52 numbered weeks under ISO 8601 and 53 under the US convention. Week 1 starts on Monday 1 January 2029 and week 52 ends on Sunday 30 December 2029.
Today in UTC.
Weeks run Monday to Sunday. Week 1 holds the first Thursday.
Week number now
of 52 in 2029 · ISO 8601 numbering
Thursday 4 January 2029 is in week 1 of 2029 under ISO 8601 numbering. That week runs from Monday 1 January 2029 to Sunday 7 January 2029.
Both conventions agree on this date: week 1 either way. They part company for most of January and often at the end of December.
Show the working
| Date | 2029-01-04 |
|---|---|
| Weekday | Thursday |
| ISO week 1 starts | 2029-01-01 |
| US week 1 starts | 2028-12-31 |
| This week runs | 2029-01-01 to 2029-01-07 |
| Weeks in 2029 | 52 weeks |
Every week of 2029
ISO 8601 weeks, running Monday to Sunday. Week 1 is the week holding the first Thursday of the year, which is why it can start in the previous December.
| Week | Starts | Ends | ISO dates |
|---|---|---|---|
| Week 1 | 1 January 2029 | 7 January 2029 | 2029-01-01 to 2029-01-07 |
| Week 2 | 8 January 2029 | 14 January 2029 | 2029-01-08 to 2029-01-14 |
| Week 3 | 15 January 2029 | 21 January 2029 | 2029-01-15 to 2029-01-21 |
| Week 4 | 22 January 2029 | 28 January 2029 | 2029-01-22 to 2029-01-28 |
| Week 5 | 29 January 2029 | 4 February 2029 | 2029-01-29 to 2029-02-04 |
| Week 6 | 5 February 2029 | 11 February 2029 | 2029-02-05 to 2029-02-11 |
| Week 7 | 12 February 2029 | 18 February 2029 | 2029-02-12 to 2029-02-18 |
| Week 8 | 19 February 2029 | 25 February 2029 | 2029-02-19 to 2029-02-25 |
| Week 9 | 26 February 2029 | 4 March 2029 | 2029-02-26 to 2029-03-04 |
| Week 10 | 5 March 2029 | 11 March 2029 | 2029-03-05 to 2029-03-11 |
| Week 11 | 12 March 2029 | 18 March 2029 | 2029-03-12 to 2029-03-18 |
| Week 12 | 19 March 2029 | 25 March 2029 | 2029-03-19 to 2029-03-25 |
| Week 13 | 26 March 2029 | 1 April 2029 | 2029-03-26 to 2029-04-01 |
| Week 14 | 2 April 2029 | 8 April 2029 | 2029-04-02 to 2029-04-08 |
| Week 15 | 9 April 2029 | 15 April 2029 | 2029-04-09 to 2029-04-15 |
| Week 16 | 16 April 2029 | 22 April 2029 | 2029-04-16 to 2029-04-22 |
| Week 17 | 23 April 2029 | 29 April 2029 | 2029-04-23 to 2029-04-29 |
| Week 18 | 30 April 2029 | 6 May 2029 | 2029-04-30 to 2029-05-06 |
| Week 19 | 7 May 2029 | 13 May 2029 | 2029-05-07 to 2029-05-13 |
| Week 20 | 14 May 2029 | 20 May 2029 | 2029-05-14 to 2029-05-20 |
| Week 21 | 21 May 2029 | 27 May 2029 | 2029-05-21 to 2029-05-27 |
| Week 22 | 28 May 2029 | 3 June 2029 | 2029-05-28 to 2029-06-03 |
| Week 23 | 4 June 2029 | 10 June 2029 | 2029-06-04 to 2029-06-10 |
| Week 24 | 11 June 2029 | 17 June 2029 | 2029-06-11 to 2029-06-17 |
| Week 25 | 18 June 2029 | 24 June 2029 | 2029-06-18 to 2029-06-24 |
| Week 26 | 25 June 2029 | 1 July 2029 | 2029-06-25 to 2029-07-01 |
| Week 27 | 2 July 2029 | 8 July 2029 | 2029-07-02 to 2029-07-08 |
| Week 28 | 9 July 2029 | 15 July 2029 | 2029-07-09 to 2029-07-15 |
| Week 29 | 16 July 2029 | 22 July 2029 | 2029-07-16 to 2029-07-22 |
| Week 30 | 23 July 2029 | 29 July 2029 | 2029-07-23 to 2029-07-29 |
| Week 31 | 30 July 2029 | 5 August 2029 | 2029-07-30 to 2029-08-05 |
| Week 32 | 6 August 2029 | 12 August 2029 | 2029-08-06 to 2029-08-12 |
| Week 33 | 13 August 2029 | 19 August 2029 | 2029-08-13 to 2029-08-19 |
| Week 34 | 20 August 2029 | 26 August 2029 | 2029-08-20 to 2029-08-26 |
| Week 35 | 27 August 2029 | 2 September 2029 | 2029-08-27 to 2029-09-02 |
| Week 36 | 3 September 2029 | 9 September 2029 | 2029-09-03 to 2029-09-09 |
| Week 37 | 10 September 2029 | 16 September 2029 | 2029-09-10 to 2029-09-16 |
| Week 38 | 17 September 2029 | 23 September 2029 | 2029-09-17 to 2029-09-23 |
| Week 39 | 24 September 2029 | 30 September 2029 | 2029-09-24 to 2029-09-30 |
| Week 40 | 1 October 2029 | 7 October 2029 | 2029-10-01 to 2029-10-07 |
| Week 41 | 8 October 2029 | 14 October 2029 | 2029-10-08 to 2029-10-14 |
| Week 42 | 15 October 2029 | 21 October 2029 | 2029-10-15 to 2029-10-21 |
| Week 43 | 22 October 2029 | 28 October 2029 | 2029-10-22 to 2029-10-28 |
| Week 44 | 29 October 2029 | 4 November 2029 | 2029-10-29 to 2029-11-04 |
| Week 45 | 5 November 2029 | 11 November 2029 | 2029-11-05 to 2029-11-11 |
| Week 46 | 12 November 2029 | 18 November 2029 | 2029-11-12 to 2029-11-18 |
| Week 47 | 19 November 2029 | 25 November 2029 | 2029-11-19 to 2029-11-25 |
| Week 48 | 26 November 2029 | 2 December 2029 | 2029-11-26 to 2029-12-02 |
| Week 49 | 3 December 2029 | 9 December 2029 | 2029-12-03 to 2029-12-09 |
| Week 50 | 10 December 2029 | 16 December 2029 | 2029-12-10 to 2029-12-16 |
| Week 51 | 17 December 2029 | 23 December 2029 | 2029-12-17 to 2029-12-23 |
| Week 52 | 24 December 2029 | 30 December 2029 | 2029-12-24 to 2029-12-30 |
2029 at a glance
| ISO 8601 weeks | 52 |
|---|---|
| US weeks | 53 |
| Days in the year | 365 |
| Leap year | No |
| 1 January falls on | Monday |
| 31 December falls on | Monday |
Why the first week can start in December
Week 1 of 2029 starts on Monday 1 January 2029. If that date is in December it is not a mistake. ISO 8601 assigns a whole week to the year holding most of its days, so a week straddling New Year belongs to one year or the other rather than being split in half.
The same rule at the other end means the last days of 2029 can fall in week 1 of 2030. Both are correct, and both are shown by the tool above when you enter a date near the boundary.
Frequently asked questions
How many weeks are in 2029?
52 under ISO 8601 numbering, and 53 under the US convention. 2029 is a common year of 365 days, which is 52 weeks and one day over.
When does week 1 of 2029 start?
Monday 1 January 2029 under ISO 8601, which runs Monday to Sunday. Under the US convention it starts on Sunday 31 December 2028. Both can begin in the previous December, which is normal.
Does 2029 have 53 weeks?
No. 2029 has 52 ISO weeks. A year only has 53 when it starts on a Thursday, or on a Wednesday in a leap year, and 1 January 2029 is a Monday.