ISO week 2026-W31

Week 31, 2026

Monday, July 27 – Sunday, August 2, 2026

ISO week 31 of 2026 (2026-W31) runs from Monday, July 27, 2026 to Sunday, August 2, 2026.

This week ended 11 weeks ago. The current week is week 42, 2026.

The 7 days of week 31

Dates in week 31, 2026
Day	Date	Day of year	US week	ISO date
Monday	July 27, 2026	208 of 365	31	2026-W31-1
Tuesday	July 28, 2026	209 of 365	31	2026-W31-2
Wednesday	July 29, 2026	210 of 365	31	2026-W31-3
Thursday	July 30, 2026	211 of 365	31	2026-W31-4
Friday	July 31, 2026	212 of 365	31	2026-W31-5
Saturday	August 1, 2026	213 of 365	31	2026-W31-6
Sunday	August 2, 2026	214 of 365	32	2026-W31-7

Week 31 at a glance

ISO code: 2026-W31 (Monday is 2026-W31-1, Sunday is 2026-W31-7)
Month: July and August
Quarter: Q3 of 2026
Day of year: Days 208–214 of 365
US week number: Monday–Saturday: US week 31; Sunday: US week 32 (Sunday-start weeks, week 1 contains January 1)
Even or odd: Week 31 is an odd week
Weeks left: After this week, 22 ISO weeks remain in 2026 (53 weeks in total)
Year progress: By Sunday, 59% of 2026 has passed

Holidays and key dates

There are no US federal holidays, daylight saving time changes or quarter starts in week 31 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 31, 2026

What are the dates of week 31 in 2026?

Week 31 of 2026 starts on Monday, July 27, 2026 and ends on Sunday, August 2, 2026.

What month is week 31 of 2026?

Week 31 falls in July and August. By the Thursday rule that ISO 8601 uses for years and quarters, it counts as a July week.

How do I get week 31 of 2026 in Excel or Google Sheets?

=ISOWEEKNUM(DATE(2026,7,27)) returns 31. To go the other way, =DATE(2026,1,4)-WEEKDAY(DATE(2026,1,4),2)+1+(31-1)*7 returns the Monday, July 27, 2026.