ISO week 2026-W27

Week 27, 2026

Monday, June 29 – Sunday, July 5, 2026

ISO week 27 of 2026 (2026-W27) runs from Monday, June 29, 2026 to Sunday, July 5, 2026.

This week ended 15 weeks ago. The current week is week 42, 2026.

The 7 days of week 27

Dates in week 27, 2026
Day	Date	Day of year	US week	ISO date
Monday	June 29, 2026	180 of 365	27	2026-W27-1
Tuesday	June 30, 2026	181 of 365	27	2026-W27-2
Wednesday	July 1, 2026	182 of 365	27	2026-W27-3
Thursday	July 2, 2026	183 of 365	27	2026-W27-4
Friday	July 3, 2026	184 of 365	27	2026-W27-5
Saturday	July 4, 2026	185 of 365	27	2026-W27-6
Sunday	July 5, 2026	186 of 365	28	2026-W27-7

Week 27 at a glance

ISO code: 2026-W27 (Monday is 2026-W27-1, Sunday is 2026-W27-7)
Month: June and July
Quarter: Q3 by the ISO rule (its Thursday, July 2, is in Q3); the calendar dates span Q2 and Q3
Day of year: Days 180–186 of 365
US week number: Monday–Saturday: US week 27; Sunday: US week 28 (Sunday-start weeks, week 1 contains January 1)
Even or odd: Week 27 is an odd week
Weeks left: After this week, 26 ISO weeks remain in 2026 (53 weeks in total)
Year progress: By Sunday, 51% of 2026 has passed

Holidays and key dates

Wednesday, July 1: Q3 begins
Friday, July 3: Independence Day (observed) – US federal holiday (July 4 falls on a Saturday)
Saturday, July 4: 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 27, 2026

What are the dates of week 27 in 2026?

Week 27 of 2026 starts on Monday, June 29, 2026 and ends on Sunday, July 5, 2026.

What month is week 27 of 2026?

Week 27 falls in June and July. By the Thursday rule that ISO 8601 uses for years and quarters, it counts as a July week.

How do I get week 27 of 2026 in Excel or Google Sheets?

=ISOWEEKNUM(DATE(2026,6,29)) returns 27. To go the other way, =DATE(2026,1,4)-WEEKDAY(DATE(2026,1,4),2)+1+(27-1)*7 returns the Monday, June 29, 2026.