ISO week 2026-W16

Week 16, 2026

Monday, April 13 – Sunday, April 19, 2026

ISO week 16 of 2026 (2026-W16) runs from Monday, April 13, 2026 to Sunday, April 19, 2026.

This week ended 26 weeks ago. The current week is week 42, 2026.

The 7 days of week 16

Dates in week 16, 2026
Day	Date	Day of year	US week	ISO date
Monday	April 13, 2026	103 of 365	16	2026-W16-1
Tuesday	April 14, 2026	104 of 365	16	2026-W16-2
Wednesday	April 15, 2026	105 of 365	16	2026-W16-3
Thursday	April 16, 2026	106 of 365	16	2026-W16-4
Friday	April 17, 2026	107 of 365	16	2026-W16-5
Saturday	April 18, 2026	108 of 365	16	2026-W16-6
Sunday	April 19, 2026	109 of 365	17	2026-W16-7

Week 16 at a glance

ISO code: 2026-W16 (Monday is 2026-W16-1, Sunday is 2026-W16-7)
Month: April
Quarter: Q2 of 2026
Day of year: Days 103–109 of 365
US week number: Monday–Saturday: US week 16; Sunday: US week 17 (Sunday-start weeks, week 1 contains January 1)
Even or odd: Week 16 is an even week
Weeks left: After this week, 37 ISO weeks remain in 2026 (53 weeks in total)
Year progress: By Sunday, 30% of 2026 has passed

Holidays and key dates

There are no US federal holidays, daylight saving time changes or quarter starts in week 16 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 16, 2026

What are the dates of week 16 in 2026?

Week 16 of 2026 starts on Monday, April 13, 2026 and ends on Sunday, April 19, 2026.

What month is week 16 of 2026?

Week 16 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 16 of 2026 in Excel or Google Sheets?

=ISOWEEKNUM(DATE(2026,4,13)) returns 16. To go the other way, =DATE(2026,1,4)-WEEKDAY(DATE(2026,1,4),2)+1+(16-1)*7 returns the Monday, April 13, 2026.