ISO week 2027-W41

Week 41, 2027

Monday, October 11 – Sunday, October 17, 2027

ISO week 41 of 2027 (2027-W41) runs from Monday, October 11, 2027 to Sunday, October 17, 2027.

This week starts 52 weeks from now. The current week is week 42, 2026.

The 7 days of week 41

Dates in week 41, 2027
Day	Date	Day of year	US week	ISO date
Monday	October 11, 2027	284 of 365	42	2027-W41-1
Tuesday	October 12, 2027	285 of 365	42	2027-W41-2
Wednesday	October 13, 2027	286 of 365	42	2027-W41-3
Thursday	October 14, 2027	287 of 365	42	2027-W41-4
Friday	October 15, 2027	288 of 365	42	2027-W41-5
Saturday	October 16, 2027	289 of 365	42	2027-W41-6
Sunday	October 17, 2027	290 of 365	43	2027-W41-7

Week 41 at a glance

ISO code: 2027-W41 (Monday is 2027-W41-1, Sunday is 2027-W41-7)
Month: October
Quarter: Q4 of 2027
Day of year: Days 284–290 of 365
US week number: Monday–Saturday: US week 42; Sunday: US week 43 (Sunday-start weeks, week 1 contains January 1)
Even or odd: Week 41 is an odd week
Weeks left: After this week, 11 ISO weeks remain in 2027 (52 weeks in total)
Year progress: By Sunday, 79% of 2027 has passed

Holidays and key dates

Monday, October 11: Columbus Day (Indigenous Peoples' 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 41, 2027

What are the dates of week 41 in 2027?

Week 41 of 2027 starts on Monday, October 11, 2027 and ends on Sunday, October 17, 2027.

What month is week 41 of 2027?

Week 41 falls in October. By the Thursday rule that ISO 8601 uses for years and quarters, it counts as a October week.

How do I get week 41 of 2027 in Excel or Google Sheets?

=ISOWEEKNUM(DATE(2027,10,11)) returns 41. To go the other way, =DATE(2027,1,4)-WEEKDAY(DATE(2027,1,4),2)+1+(41-1)*7 returns the Monday, October 11, 2027.