ISO week 2027-W49

Week 49, 2027

Monday, December 6 – Sunday, December 12, 2027

ISO week 49 of 2027 (2027-W49) runs from Monday, December 6, 2027 to Sunday, December 12, 2027.

This week starts 60 weeks from now. The current week is week 42, 2026.

The 7 days of week 49

Dates in week 49, 2027
Day	Date	Day of year	US week	ISO date
Monday	December 6, 2027	340 of 365	50	2027-W49-1
Tuesday	December 7, 2027	341 of 365	50	2027-W49-2
Wednesday	December 8, 2027	342 of 365	50	2027-W49-3
Thursday	December 9, 2027	343 of 365	50	2027-W49-4
Friday	December 10, 2027	344 of 365	50	2027-W49-5
Saturday	December 11, 2027	345 of 365	50	2027-W49-6
Sunday	December 12, 2027	346 of 365	51	2027-W49-7

Week 49 at a glance

ISO code: 2027-W49 (Monday is 2027-W49-1, Sunday is 2027-W49-7)
Month: December
Quarter: Q4 of 2027
Day of year: Days 340–346 of 365
US week number: Monday–Saturday: US week 50; Sunday: US week 51 (Sunday-start weeks, week 1 contains January 1)
Even or odd: Week 49 is an odd week
Weeks left: After this week, 3 ISO weeks remain in 2027 (52 weeks in total)
Year progress: By Sunday, 95% of 2027 has passed

Holidays and key dates

There are no US federal holidays, daylight saving time changes or quarter starts in week 49 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 49, 2027

What are the dates of week 49 in 2027?

Week 49 of 2027 starts on Monday, December 6, 2027 and ends on Sunday, December 12, 2027.

What month is week 49 of 2027?

Week 49 falls in December. By the Thursday rule that ISO 8601 uses for years and quarters, it counts as a December week.

How do I get week 49 of 2027 in Excel or Google Sheets?

=ISOWEEKNUM(DATE(2027,12,6)) returns 49. To go the other way, =DATE(2027,1,4)-WEEKDAY(DATE(2027,1,4),2)+1+(49-1)*7 returns the Monday, December 6, 2027.