ISO week 2026-W17

Week 17, 2026

Monday, April 20 – Sunday, April 26, 2026

ISO week 17 of 2026 (2026-W17) runs from Monday, April 20, 2026 to Sunday, April 26, 2026.

This week ended 25 weeks ago. The current week is week 42, 2026.

The 7 days of week 17

Dates in week 17, 2026
Day	Date	Day of year	US week	ISO date
Monday	April 20, 2026	110 of 365	17	2026-W17-1
Tuesday	April 21, 2026	111 of 365	17	2026-W17-2
Wednesday	April 22, 2026	112 of 365	17	2026-W17-3
Thursday	April 23, 2026	113 of 365	17	2026-W17-4
Friday	April 24, 2026	114 of 365	17	2026-W17-5
Saturday	April 25, 2026	115 of 365	17	2026-W17-6
Sunday	April 26, 2026	116 of 365	18	2026-W17-7

Week 17 at a glance

ISO code: 2026-W17 (Monday is 2026-W17-1, Sunday is 2026-W17-7)
Month: April
Quarter: Q2 of 2026
Day of year: Days 110–116 of 365
US week number: Monday–Saturday: US week 17; Sunday: US week 18 (Sunday-start weeks, week 1 contains January 1)
Even or odd: Week 17 is an odd week
Weeks left: After this week, 36 ISO weeks remain in 2026 (53 weeks in total)
Year progress: By Sunday, 32% of 2026 has passed

Holidays and key dates

There are no US federal holidays, daylight saving time changes or quarter starts in week 17 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 17, 2026

What are the dates of week 17 in 2026?

Week 17 of 2026 starts on Monday, April 20, 2026 and ends on Sunday, April 26, 2026.

What month is week 17 of 2026?

Week 17 falls in April. By the Thursday rule that ISO 8601 uses for years and quarters, it counts as a April week.

How do I get week 17 of 2026 in Excel or Google Sheets?

=ISOWEEKNUM(DATE(2026,4,20)) returns 17. To go the other way, =DATE(2026,1,4)-WEEKDAY(DATE(2026,1,4),2)+1+(17-1)*7 returns the Monday, April 20, 2026.