Week 17 of 2026 runs April 20, 2026 to April 26, 2026.
Week 17 starts on Monday, April 20, 2026 and ends on Sunday, April 26, 2026. It's the 110th day of the year, sits in Q2, and falls in April. By the end of this week, 116 of 365 days are gone, putting 2026 at 31.8%.
This week includes Earth Day, so it has 5 working days instead of the usual 5. Need a different week? Browse the full 2026 week calendar, or jump to this week's number.
Week 17 at a glance
The 7 days of week 17
Every date in week 17 of 2026, Monday through Sunday, with day-of-year numbers and events.
| Day | Date | Day no. | Type | Events |
|---|---|---|---|---|
| Monday | Day 110 | Weekday | ||
| Tuesday | Day 111 | Weekday | ||
| Wednesday | Day 112 | Weekday | Earth Day | |
| Thursday | Day 113 | Weekday | ||
| Friday | Day 114 | Weekday | ||
| Saturday | Day 115 | Weekend | ||
| Sunday | Day 116 | Weekend |
What week 17 of 2026 means
ISO 8601 numbers weeks so every week starts on Monday and ends on Sunday. Week 1 is the one holding the year's first Thursday, which is why early January can land in week 52 or 53 of the previous year. Week 17 is one piece of that system.
In 2026, week 17 covers Apr 20 – Apr 26, 2026. That's April, deep in Q2. The same week number shifts by a day or two each year, so week 17 in 2027 won't share these exact dates. The table below shows how it moves.
Want to check a specific date instead of a week number? The week calculator converts any date to its ISO week. Curious how many weeks a year holds? The weeks in a year guide explains 52 versus 53. And the ISO week number page covers the standard end to end.
Holidays in week 17 of 2026
Week 17 across years
The same ISO week number lands on different dates each year. Here's how week 17 shifts.
Week 17 of 2026: questions and answers
What days are in week 17 of 2026?
Week 17 of 2026 runs from April 20, 2026 (Monday) through April 26, 2026 (Sunday). It spans April.
What month is week 17 in 2026?
Week 17 of 2026 falls entirely in April 2026.
How many working days are in week 17 of 2026?
Week 17 of 2026 has 5 working days.
What week is Earth Day in 2026?
Earth Day falls in ISO week 17 of 2026 (Apr 20 – Apr 26, 2026).
What quarter is week 17 of 2026 in?
Week 17 of 2026 is in Q2 (2026). The week starts on day 110 of 365.
What is ISO week 17?
ISO week 17 is defined by the ISO 8601 international standard. It begins on Monday, April 20, 2026, and ends on Sunday, April 26, 2026. It is week 32% through the ISO year 2026.