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Week numbers 2023

Week numbers 2023

2023 has 52 ISO weeks. Each row gives the Monday and the Sunday of the week. Print this page for a plain list of the weeks.

Weeks in 2023
52 weeks
A regular year: it has 52 ISO weeks.
Week 1 starts
Monday, 2 January 2023
the week that contains 4 January
Last week ends
Sunday, 31 December 2023
week 52
1 January 2023
Week 52 of 2022
Weeks 1 and 52 can include days of the neighbouring years: a week belongs to the year that contains its Thursday.

Printable 2023 calendars by countryWith public holidays and week numbers, as a PDF or PNG.

All weeks

The 52 weeks of 2023

  1. Week 1Mon 2 Jan – Sun, 8 Jan 2023
  2. Week 2Mon 9 Jan – Sun, 15 Jan 2023
  3. Week 3Mon 16 Jan – Sun, 22 Jan 2023
  4. Week 4Mon 23 Jan – Sun, 29 Jan 2023
  5. Week 5Mon 30 Jan – Sun, 5 Feb 2023
  6. Week 6Mon 6 Feb – Sun, 12 Feb 2023
  7. Week 7Mon 13 Feb – Sun, 19 Feb 2023
  8. Week 8Mon 20 Feb – Sun, 26 Feb 2023
  9. Week 9Mon 27 Feb – Sun, 5 Mar 2023
  10. Week 10Mon 6 Mar – Sun, 12 Mar 2023
  11. Week 11Mon 13 Mar – Sun, 19 Mar 2023
  12. Week 12Mon 20 Mar – Sun, 26 Mar 2023
  13. Week 13Mon 27 Mar – Sun, 2 Apr 2023
  14. Week 14Mon 3 Apr – Sun, 9 Apr 2023
  15. Week 15Mon 10 Apr – Sun, 16 Apr 2023
  16. Week 16Mon 17 Apr – Sun, 23 Apr 2023
  17. Week 17Mon 24 Apr – Sun, 30 Apr 2023
  18. Week 18Mon 1 May – Sun, 7 May 2023
  19. Week 19Mon 8 May – Sun, 14 May 2023
  20. Week 20Mon 15 May – Sun, 21 May 2023
  21. Week 21Mon 22 May – Sun, 28 May 2023
  22. Week 22Mon 29 May – Sun, 4 Jun 2023
  23. Week 23Mon 5 Jun – Sun, 11 Jun 2023
  24. Week 24Mon 12 Jun – Sun, 18 Jun 2023
  25. Week 25Mon 19 Jun – Sun, 25 Jun 2023
  26. Week 26Mon 26 Jun – Sun, 2 Jul 2023
  27. Week 27Mon 3 Jul – Sun, 9 Jul 2023
  28. Week 28Mon 10 Jul – Sun, 16 Jul 2023
  29. Week 29Mon 17 Jul – Sun, 23 Jul 2023
  30. Week 30Mon 24 Jul – Sun, 30 Jul 2023
  31. Week 31Mon 31 Jul – Sun, 6 Aug 2023
  32. Week 32Mon 7 Aug – Sun, 13 Aug 2023
  33. Week 33Mon 14 Aug – Sun, 20 Aug 2023
  34. Week 34Mon 21 Aug – Sun, 27 Aug 2023
  35. Week 35Mon 28 Aug – Sun, 3 Sept 2023
  36. Week 36Mon 4 Sept – Sun, 10 Sept 2023
  37. Week 37Mon 11 Sept – Sun, 17 Sept 2023
  38. Week 38Mon 18 Sept – Sun, 24 Sept 2023
  39. Week 39Mon 25 Sept – Sun, 1 Oct 2023
  40. Week 40Mon 2 Oct – Sun, 8 Oct 2023
  41. Week 41Mon 9 Oct – Sun, 15 Oct 2023
  42. Week 42Mon 16 Oct – Sun, 22 Oct 2023
  43. Week 43Mon 23 Oct – Sun, 29 Oct 2023
  44. Week 44Mon 30 Oct – Sun, 5 Nov 2023
  45. Week 45Mon 6 Nov – Sun, 12 Nov 2023
  46. Week 46Mon 13 Nov – Sun, 19 Nov 2023
  47. Week 47Mon 20 Nov – Sun, 26 Nov 2023
  48. Week 48Mon 27 Nov – Sun, 3 Dec 2023
  49. Week 49Mon 4 Dec – Sun, 10 Dec 2023
  50. Week 50Mon 11 Dec – Sun, 17 Dec 2023
  51. Week 51Mon 18 Dec – Sun, 24 Dec 2023
  52. Week 52Mon 25 Dec – Sun, 31 Dec 2023

What week is it now?202220242026

How it works

Week number

2023 has 52 ISO weeks. It begins on a Sunday; only years that begin on a Thursday, or on a Wednesday in a leap year, have 53 weeks.

ISO 8601 numbers the weeks of a year from 1 to 52 or 53. Weeks run from Monday to Sunday, and week 1 is the week that holds the first Thursday of the year, which is also the week that contains 4 January. Each week belongs to the year that contains its Thursday.

Questions

Good to know

How many weeks are there in 2023?

2023 has 52 ISO weeks (52 or 53 in any year).

When does week 1 of 2023 start?

Week 1 of 2023 runs Mon 2 Jan – Sun, 8 Jan 2023. It is the week that contains 4 January 2023.

Which years after 2023 have 53 weeks?

2026, 2032, 2037, 2043. A year has 53 ISO weeks when 1 January is a Thursday, or a Wednesday in a leap year.

How do I get a printable list or calendar?

Use the print button above for this list of weeks, or open the printable calendar of your country: it marks the public holidays and shows the ISO week number of every week.