ISO week 2026-W19

Week 19, 2026

Monday, May 4 – Sunday, May 10, 2026

ISO week 19 of 2026 (2026-W19) runs from Monday, May 4, 2026 to Sunday, May 10, 2026.

This week ended 23 weeks ago. The current week is week 42, 2026.

The 7 days of week 19

Dates in week 19, 2026
Day	Date	Day of year	US week	ISO date
Monday	May 4, 2026	124 of 365	19	2026-W19-1
Tuesday	May 5, 2026	125 of 365	19	2026-W19-2
Wednesday	May 6, 2026	126 of 365	19	2026-W19-3
Thursday	May 7, 2026	127 of 365	19	2026-W19-4
Friday	May 8, 2026	128 of 365	19	2026-W19-5
Saturday	May 9, 2026	129 of 365	19	2026-W19-6
Sunday	May 10, 2026	130 of 365	20	2026-W19-7

Week 19 at a glance

ISO code: 2026-W19 (Monday is 2026-W19-1, Sunday is 2026-W19-7)
Month: May
Quarter: Q2 of 2026
Day of year: Days 124–130 of 365
US week number: Monday–Saturday: US week 19; Sunday: US week 20 (Sunday-start weeks, week 1 contains January 1)
Even or odd: Week 19 is an odd week
Weeks left: After this week, 34 ISO weeks remain in 2026 (53 weeks in total)
Year progress: By Sunday, 36% of 2026 has passed

Holidays and key dates

There are no US federal holidays, daylight saving time changes or quarter starts in week 19 of 2026.

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 19, 2026

What are the dates of week 19 in 2026?

Week 19 of 2026 starts on Monday, May 4, 2026 and ends on Sunday, May 10, 2026.

What month is week 19 of 2026?

Week 19 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 19 of 2026 in Excel or Google Sheets?

=ISOWEEKNUM(DATE(2026,5,4)) returns 19. To go the other way, =DATE(2026,1,4)-WEEKDAY(DATE(2026,1,4),2)+1+(19-1)*7 returns the Monday, May 4, 2026.