ISO week 2026-W25

Week 25, 2026

Monday, June 15 – Sunday, June 21, 2026

ISO week 25 of 2026 (2026-W25) runs from Monday, June 15, 2026 to Sunday, June 21, 2026.

This week ended 17 weeks ago. The current week is week 42, 2026.

The 7 days of week 25

Dates in week 25, 2026
Day	Date	Day of year	US week	ISO date
Monday	June 15, 2026	166 of 365	25	2026-W25-1
Tuesday	June 16, 2026	167 of 365	25	2026-W25-2
Wednesday	June 17, 2026	168 of 365	25	2026-W25-3
Thursday	June 18, 2026	169 of 365	25	2026-W25-4
Friday	June 19, 2026	170 of 365	25	2026-W25-5
Saturday	June 20, 2026	171 of 365	25	2026-W25-6
Sunday	June 21, 2026	172 of 365	26	2026-W25-7

Week 25 at a glance

ISO code: 2026-W25 (Monday is 2026-W25-1, Sunday is 2026-W25-7)
Month: June
Quarter: Q2 of 2026
Day of year: Days 166–172 of 365
US week number: Monday–Saturday: US week 25; Sunday: US week 26 (Sunday-start weeks, week 1 contains January 1)
Even or odd: Week 25 is an odd week
Weeks left: After this week, 28 ISO weeks remain in 2026 (53 weeks in total)
Year progress: By Sunday, 47% of 2026 has passed

Holidays and key dates

Friday, June 19: Juneteenth National Independence Day – US federal holiday

Week numbers follow ISO 8601: weeks start on Monday and week 1 contains the first Thursday of the year. US weeks start on Sunday, with week 1 containing January 1.

Questions about week 25, 2026

What are the dates of week 25 in 2026?

Week 25 of 2026 starts on Monday, June 15, 2026 and ends on Sunday, June 21, 2026.

What month is week 25 of 2026?

Week 25 falls in June. By the Thursday rule that ISO 8601 uses for years and quarters, it counts as a June week.

How do I get week 25 of 2026 in Excel or Google Sheets?

=ISOWEEKNUM(DATE(2026,6,15)) returns 25. To go the other way, =DATE(2026,1,4)-WEEKDAY(DATE(2026,1,4),2)+1+(25-1)*7 returns the Monday, June 15, 2026.