Week 25 of 2026
June 15 – June 21, 2026
| Monday | June 15, 2026 | Mon · week starts |
| Tuesday | June 16, 2026 | |
| Wednesday | June 17, 2026 | |
| Thursday | June 18, 2026 | |
| Friday | June 19, 2026 | |
| Saturday | June 20, 2026 | |
| Sunday | June 21, 2026 | Sun · week ends |
All weeks of 2026
2026 is an ISO year with 53 weeks.
About ISO week 25 of 2026
ISO 8601 weeks start on Monday and end on Sunday. Week 25 of 2026 begins on Monday, June 15, 2026 and ends on Sunday, June 21, 2026. Week numbering follows the international standard: week 1 of a year is the week containing the first Thursday of January, which is why some calendar dates near January 1st belong to the previous or next ISO year.
The ISO week system is the standard for business reporting across Europe and much of the world. The US convention differs: weeks start on Sunday and week 1 contains January 1st, so US week numbers can be one ahead of or behind ISO numbers near year boundaries.
Frequently asked questions
What dates are in week 25 of 2026?
Week 25 of 2026 spans June 15 – June 21, 2026: Monday June 15 through Sunday June 21.
When is week 25 of 2026?
Week 25 of 2026 started 134 days ago, on Monday, June 15, 2026.
Why does 2026 have 53 weeks?
2026 is a "long" ISO year with 53 weeks. This happens when the year starts on a Thursday, or on a Wednesday in a leap year — the extra days spill into a 53rd numbered week.