Week Numbers 2028
2028 has 52 numbered weeks under ISO 8601 and 54 under the US convention. Week 1 starts on Monday 3 January 2028 and week 52 ends on Sunday 31 December 2028.
Today in UTC.
Weeks run Monday to Sunday. Week 1 holds the first Thursday.
Week number now
of 52 in 2028 · ISO 8601 numbering
Tuesday 4 January 2028 is in week 1 of 2028 under ISO 8601 numbering. That week runs from Monday 3 January 2028 to Sunday 9 January 2028.
The two conventions disagree on this date. US numbering makes it week 2 of 2028. Check which one the system you are filling in uses, because a week number without its convention is not a complete answer.
Show the working
| Date | 2028-01-04 |
|---|---|
| Weekday | Tuesday |
| ISO week 1 starts | 2028-01-03 |
| US week 1 starts | 2027-12-26 |
| This week runs | 2028-01-03 to 2028-01-09 |
| Weeks in 2028 | 52 weeks |
Every week of 2028
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 | 3 January 2028 | 9 January 2028 | 2028-01-03 to 2028-01-09 |
| Week 2 | 10 January 2028 | 16 January 2028 | 2028-01-10 to 2028-01-16 |
| Week 3 | 17 January 2028 | 23 January 2028 | 2028-01-17 to 2028-01-23 |
| Week 4 | 24 January 2028 | 30 January 2028 | 2028-01-24 to 2028-01-30 |
| Week 5 | 31 January 2028 | 6 February 2028 | 2028-01-31 to 2028-02-06 |
| Week 6 | 7 February 2028 | 13 February 2028 | 2028-02-07 to 2028-02-13 |
| Week 7 | 14 February 2028 | 20 February 2028 | 2028-02-14 to 2028-02-20 |
| Week 8 | 21 February 2028 | 27 February 2028 | 2028-02-21 to 2028-02-27 |
| Week 9 | 28 February 2028 | 5 March 2028 | 2028-02-28 to 2028-03-05 |
| Week 10 | 6 March 2028 | 12 March 2028 | 2028-03-06 to 2028-03-12 |
| Week 11 | 13 March 2028 | 19 March 2028 | 2028-03-13 to 2028-03-19 |
| Week 12 | 20 March 2028 | 26 March 2028 | 2028-03-20 to 2028-03-26 |
| Week 13 | 27 March 2028 | 2 April 2028 | 2028-03-27 to 2028-04-02 |
| Week 14 | 3 April 2028 | 9 April 2028 | 2028-04-03 to 2028-04-09 |
| Week 15 | 10 April 2028 | 16 April 2028 | 2028-04-10 to 2028-04-16 |
| Week 16 | 17 April 2028 | 23 April 2028 | 2028-04-17 to 2028-04-23 |
| Week 17 | 24 April 2028 | 30 April 2028 | 2028-04-24 to 2028-04-30 |
| Week 18 | 1 May 2028 | 7 May 2028 | 2028-05-01 to 2028-05-07 |
| Week 19 | 8 May 2028 | 14 May 2028 | 2028-05-08 to 2028-05-14 |
| Week 20 | 15 May 2028 | 21 May 2028 | 2028-05-15 to 2028-05-21 |
| Week 21 | 22 May 2028 | 28 May 2028 | 2028-05-22 to 2028-05-28 |
| Week 22 | 29 May 2028 | 4 June 2028 | 2028-05-29 to 2028-06-04 |
| Week 23 | 5 June 2028 | 11 June 2028 | 2028-06-05 to 2028-06-11 |
| Week 24 | 12 June 2028 | 18 June 2028 | 2028-06-12 to 2028-06-18 |
| Week 25 | 19 June 2028 | 25 June 2028 | 2028-06-19 to 2028-06-25 |
| Week 26 | 26 June 2028 | 2 July 2028 | 2028-06-26 to 2028-07-02 |
| Week 27 | 3 July 2028 | 9 July 2028 | 2028-07-03 to 2028-07-09 |
| Week 28 | 10 July 2028 | 16 July 2028 | 2028-07-10 to 2028-07-16 |
| Week 29 | 17 July 2028 | 23 July 2028 | 2028-07-17 to 2028-07-23 |
| Week 30 | 24 July 2028 | 30 July 2028 | 2028-07-24 to 2028-07-30 |
| Week 31 | 31 July 2028 | 6 August 2028 | 2028-07-31 to 2028-08-06 |
| Week 32 | 7 August 2028 | 13 August 2028 | 2028-08-07 to 2028-08-13 |
| Week 33 | 14 August 2028 | 20 August 2028 | 2028-08-14 to 2028-08-20 |
| Week 34 | 21 August 2028 | 27 August 2028 | 2028-08-21 to 2028-08-27 |
| Week 35 | 28 August 2028 | 3 September 2028 | 2028-08-28 to 2028-09-03 |
| Week 36 | 4 September 2028 | 10 September 2028 | 2028-09-04 to 2028-09-10 |
| Week 37 | 11 September 2028 | 17 September 2028 | 2028-09-11 to 2028-09-17 |
| Week 38 | 18 September 2028 | 24 September 2028 | 2028-09-18 to 2028-09-24 |
| Week 39 | 25 September 2028 | 1 October 2028 | 2028-09-25 to 2028-10-01 |
| Week 40 | 2 October 2028 | 8 October 2028 | 2028-10-02 to 2028-10-08 |
| Week 41 | 9 October 2028 | 15 October 2028 | 2028-10-09 to 2028-10-15 |
| Week 42 | 16 October 2028 | 22 October 2028 | 2028-10-16 to 2028-10-22 |
| Week 43 | 23 October 2028 | 29 October 2028 | 2028-10-23 to 2028-10-29 |
| Week 44 | 30 October 2028 | 5 November 2028 | 2028-10-30 to 2028-11-05 |
| Week 45 | 6 November 2028 | 12 November 2028 | 2028-11-06 to 2028-11-12 |
| Week 46 | 13 November 2028 | 19 November 2028 | 2028-11-13 to 2028-11-19 |
| Week 47 | 20 November 2028 | 26 November 2028 | 2028-11-20 to 2028-11-26 |
| Week 48 | 27 November 2028 | 3 December 2028 | 2028-11-27 to 2028-12-03 |
| Week 49 | 4 December 2028 | 10 December 2028 | 2028-12-04 to 2028-12-10 |
| Week 50 | 11 December 2028 | 17 December 2028 | 2028-12-11 to 2028-12-17 |
| Week 51 | 18 December 2028 | 24 December 2028 | 2028-12-18 to 2028-12-24 |
| Week 52 | 25 December 2028 | 31 December 2028 | 2028-12-25 to 2028-12-31 |
2028 at a glance
| ISO 8601 weeks | 52 |
|---|---|
| US weeks | 54 |
| Days in the year | 366 |
| Leap year | Yes |
| 1 January falls on | Saturday |
| 31 December falls on | Sunday |
Why the first week can start in December
Week 1 of 2028 starts on Monday 3 January 2028. 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 2028 can fall in week 1 of 2029. 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 2028?
52 under ISO 8601 numbering, and 54 under the US convention. 2028 is a leap year of 366 days, which is 52 weeks and two days over.
When does week 1 of 2028 start?
Monday 3 January 2028 under ISO 8601, which runs Monday to Sunday. Under the US convention it starts on Sunday 26 December 2027. Both can begin in the previous December, which is normal.
Does 2028 have 53 weeks?
No. 2028 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 2028 is a Saturday.