2026 Week Calendar

All 53 ISO 8601 weeks with Monday-to-Sunday dates

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2026 ISO Week Calendar — All 53 Weeks

The year 2026 has 53 weeks according to the ISO 8601 standard. Below is a complete list of every week with its exact Monday (start) and Sunday (end) dates. Each row links to the full week details page.

Week Monday (Start) Sunday (End)
Week 1 December 29, 2025 January 4, 2026
Week 2 January 5, 2026 January 11, 2026
Week 3 January 12, 2026 January 18, 2026
Week 4 January 19, 2026 January 25, 2026
Week 5 January 26, 2026 February 1, 2026
Week 6 February 2, 2026 February 8, 2026
Week 7 February 9, 2026 February 15, 2026
Week 8 February 16, 2026 February 22, 2026
Week 9 February 23, 2026 March 1, 2026
Week 10 March 2, 2026 March 8, 2026
Week 11 March 9, 2026 March 15, 2026
Week 12 March 16, 2026 March 22, 2026
Week 13 March 23, 2026 March 29, 2026
Week 14 March 30, 2026 April 5, 2026
Week 15 April 6, 2026 April 12, 2026
Week 16 April 13, 2026 April 19, 2026
Week 17 April 20, 2026 April 26, 2026
Week 18 April 27, 2026 May 3, 2026
Week 19 May 4, 2026 May 10, 2026
Week 20 May 11, 2026 May 17, 2026
Week 21 May 18, 2026 May 24, 2026
Week 22 May 25, 2026 May 31, 2026
Week 23 June 1, 2026 June 7, 2026
Week 24 June 8, 2026 June 14, 2026
Week 25 June 15, 2026 June 21, 2026
Week 26 June 22, 2026 June 28, 2026
Week 27 June 29, 2026 July 5, 2026
Week 28 July 6, 2026 July 12, 2026
Week 29 July 13, 2026 July 19, 2026
Week 30 July 20, 2026 July 26, 2026
Week 31 July 27, 2026 August 2, 2026
Week 32 August 3, 2026 August 9, 2026
Week 33 August 10, 2026 August 16, 2026
Week 34 August 17, 2026 August 23, 2026
Week 35 August 24, 2026 August 30, 2026
Week 36 August 31, 2026 September 6, 2026
Week 37 September 7, 2026 September 13, 2026
Week 38 September 14, 2026 September 20, 2026
Week 39 September 21, 2026 September 27, 2026
Week 40 September 28, 2026 October 4, 2026
Week 41 October 5, 2026 October 11, 2026
Week 42 October 12, 2026 October 18, 2026
Week 43 October 19, 2026 October 25, 2026
Week 44 October 26, 2026 November 1, 2026
Week 45 November 2, 2026 November 8, 2026
Week 46 November 9, 2026 November 15, 2026
Week 47 November 16, 2026 November 22, 2026
Week 48 November 23, 2026 November 29, 2026
Week 49 November 30, 2026 December 6, 2026
Week 50 December 7, 2026 December 13, 2026
Week 51 December 14, 2026 December 20, 2026
Week 52 December 21, 2026 December 27, 2026
Week 53 December 28, 2026 January 3, 2027
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❓ Related questions about 2026

What is the week number for January 1, 2026?

January 1, 2026 is in Week 1 of 2026. The ISO week number for Jan 1 depends on which day of the week Jan 1 falls on.

What is the week number for December 31, 2026?

December 31, 2026 is in Week 53 of 2026.

Is 2026 a leap year?

2026 is not a leap year and has 365 days.

❓ Frequently asked questions about 2026

How many weeks are in 2026?

2026 has 53 weeks according to ISO 8601. This is a 53-week year.

What is Week 1 of 2026?

When does Week 1 of 2026 start?

Week 1 of 2026 starts on December 29, 2025 and ends on January 4, 2026.

How is the week number determined for 2026?

ISO 8601 week numbers are determined by the year that contains Thursday. Week 1 of 2026 is the week containing January 4, 2026. Each subsequent week is numbered sequentially.