ISO week 2026-W34

Week 34, 2026

Monday, August 17 – Sunday, August 23, 2026

ISO week 34 of 2026 (2026-W34) runs from Monday, August 17, 2026 to Sunday, August 23, 2026.

This week ended 8 weeks ago. The current week is week 42, 2026.

The 7 days of week 34

Dates in week 34, 2026
Day	Date	Day of year	US week	ISO date
Monday	August 17, 2026	229 of 365	34	2026-W34-1
Tuesday	August 18, 2026	230 of 365	34	2026-W34-2
Wednesday	August 19, 2026	231 of 365	34	2026-W34-3
Thursday	August 20, 2026	232 of 365	34	2026-W34-4
Friday	August 21, 2026	233 of 365	34	2026-W34-5
Saturday	August 22, 2026	234 of 365	34	2026-W34-6
Sunday	August 23, 2026	235 of 365	35	2026-W34-7

Week 34 at a glance

ISO code: 2026-W34 (Monday is 2026-W34-1, Sunday is 2026-W34-7)
Month: August
Quarter: Q3 of 2026
Day of year: Days 229–235 of 365
US week number: Monday–Saturday: US week 34; Sunday: US week 35 (Sunday-start weeks, week 1 contains January 1)
Even or odd: Week 34 is an even week
Weeks left: After this week, 19 ISO weeks remain in 2026 (53 weeks in total)
Year progress: By Sunday, 64% of 2026 has passed

Holidays and key dates

There are no US federal holidays, daylight saving time changes or quarter starts in week 34 of 2026.

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 34, 2026

What are the dates of week 34 in 2026?

Week 34 of 2026 starts on Monday, August 17, 2026 and ends on Sunday, August 23, 2026.

What month is week 34 of 2026?

Week 34 falls in August. By the Thursday rule that ISO 8601 uses for years and quarters, it counts as a August week.

How do I get week 34 of 2026 in Excel or Google Sheets?

=ISOWEEKNUM(DATE(2026,8,17)) returns 34. To go the other way, =DATE(2026,1,4)-WEEKDAY(DATE(2026,1,4),2)+1+(34-1)*7 returns the Monday, August 17, 2026.