ISO week 2027-W20

Week 20, 2027

Monday, May 17 – Sunday, May 23, 2027

ISO week 20 of 2027 (2027-W20) runs from Monday, May 17, 2027 to Sunday, May 23, 2027.

This week starts 31 weeks from now. The current week is week 42, 2026.

The 7 days of week 20

Dates in week 20, 2027
Day	Date	Day of year	US week	ISO date
Monday	May 17, 2027	137 of 365	21	2027-W20-1
Tuesday	May 18, 2027	138 of 365	21	2027-W20-2
Wednesday	May 19, 2027	139 of 365	21	2027-W20-3
Thursday	May 20, 2027	140 of 365	21	2027-W20-4
Friday	May 21, 2027	141 of 365	21	2027-W20-5
Saturday	May 22, 2027	142 of 365	21	2027-W20-6
Sunday	May 23, 2027	143 of 365	22	2027-W20-7

Week 20 at a glance

ISO code: 2027-W20 (Monday is 2027-W20-1, Sunday is 2027-W20-7)
Month: May
Quarter: Q2 of 2027
Day of year: Days 137–143 of 365
US week number: Monday–Saturday: US week 21; Sunday: US week 22 (Sunday-start weeks, week 1 contains January 1)
Even or odd: Week 20 is an even week
Weeks left: After this week, 32 ISO weeks remain in 2027 (52 weeks in total)
Year progress: By Sunday, 39% of 2027 has passed

Holidays and key dates

There are no US federal holidays, daylight saving time changes or quarter starts in week 20 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 20, 2027

What are the dates of week 20 in 2027?

Week 20 of 2027 starts on Monday, May 17, 2027 and ends on Sunday, May 23, 2027.

What month is week 20 of 2027?

Week 20 falls in May. By the Thursday rule that ISO 8601 uses for years and quarters, it counts as a May week.

How do I get week 20 of 2027 in Excel or Google Sheets?

=ISOWEEKNUM(DATE(2027,5,17)) returns 20. To go the other way, =DATE(2027,1,4)-WEEKDAY(DATE(2027,1,4),2)+1+(20-1)*7 returns the Monday, May 17, 2027.