ISO week 2027-W43

Week 43, 2027

Monday, October 25 – Sunday, October 31, 2027

ISO week 43 of 2027 (2027-W43) runs from Monday, October 25, 2027 to Sunday, October 31, 2027.

This week starts 54 weeks from now. The current week is week 42, 2026.

The 7 days of week 43

Dates in week 43, 2027
Day	Date	Day of year	US week	ISO date
Monday	October 25, 2027	298 of 365	44	2027-W43-1
Tuesday	October 26, 2027	299 of 365	44	2027-W43-2
Wednesday	October 27, 2027	300 of 365	44	2027-W43-3
Thursday	October 28, 2027	301 of 365	44	2027-W43-4
Friday	October 29, 2027	302 of 365	44	2027-W43-5
Saturday	October 30, 2027	303 of 365	44	2027-W43-6
Sunday	October 31, 2027	304 of 365	45	2027-W43-7

Week 43 at a glance

ISO code: 2027-W43 (Monday is 2027-W43-1, Sunday is 2027-W43-7)
Month: October
Quarter: Q4 of 2027
Day of year: Days 298–304 of 365
US week number: Monday–Saturday: US week 44; Sunday: US week 45 (Sunday-start weeks, week 1 contains January 1)
Even or odd: Week 43 is an odd week
Weeks left: After this week, 9 ISO weeks remain in 2027 (52 weeks in total)
Year progress: By Sunday, 83% of 2027 has passed

Holidays and key dates

Sunday, October 31: Summer time ends in the EU and UK (clocks go back one hour)

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 43, 2027

What are the dates of week 43 in 2027?

Week 43 of 2027 starts on Monday, October 25, 2027 and ends on Sunday, October 31, 2027.

What month is week 43 of 2027?

Week 43 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 43 of 2027 in Excel or Google Sheets?

=ISOWEEKNUM(DATE(2027,10,25)) returns 43. To go the other way, =DATE(2027,1,4)-WEEKDAY(DATE(2027,1,4),2)+1+(43-1)*7 returns the Monday, October 25, 2027.