ISO week 2027-W38

Week 38, 2027

Monday, September 20 – Sunday, September 26, 2027

ISO week 38 of 2027 (2027-W38) runs from Monday, September 20, 2027 to Sunday, September 26, 2027.

This week starts 49 weeks from now. The current week is week 42, 2026.

The 7 days of week 38

Dates in week 38, 2027
Day	Date	Day of year	US week	ISO date
Monday	September 20, 2027	263 of 365	39	2027-W38-1
Tuesday	September 21, 2027	264 of 365	39	2027-W38-2
Wednesday	September 22, 2027	265 of 365	39	2027-W38-3
Thursday	September 23, 2027	266 of 365	39	2027-W38-4
Friday	September 24, 2027	267 of 365	39	2027-W38-5
Saturday	September 25, 2027	268 of 365	39	2027-W38-6
Sunday	September 26, 2027	269 of 365	40	2027-W38-7

Week 38 at a glance

ISO code: 2027-W38 (Monday is 2027-W38-1, Sunday is 2027-W38-7)
Month: September
Quarter: Q3 of 2027
Day of year: Days 263–269 of 365
US week number: Monday–Saturday: US week 39; Sunday: US week 40 (Sunday-start weeks, week 1 contains January 1)
Even or odd: Week 38 is an even week
Weeks left: After this week, 14 ISO weeks remain in 2027 (52 weeks in total)
Year progress: By Sunday, 74% of 2027 has passed

Holidays and key dates

There are no US federal holidays, daylight saving time changes or quarter starts in week 38 of 2027.

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 38, 2027

What are the dates of week 38 in 2027?

Week 38 of 2027 starts on Monday, September 20, 2027 and ends on Sunday, September 26, 2027.

What month is week 38 of 2027?

Week 38 falls in September. By the Thursday rule that ISO 8601 uses for years and quarters, it counts as a September week.

How do I get week 38 of 2027 in Excel or Google Sheets?

=ISOWEEKNUM(DATE(2027,9,20)) returns 38. To go the other way, =DATE(2027,1,4)-WEEKDAY(DATE(2027,1,4),2)+1+(38-1)*7 returns the Monday, September 20, 2027.