Week 17 2026: April 20–26, 2026
Week 17 starts on Monday, April 20, 2026 and ends on Sunday, April 26, 2026.
Quick answer
Week 17 of 2026 is the seven-day ISO week from April 20, 2026 to April 26, 2026. ISO weeks always run from Monday to Sunday.
Use week 17 in professional planning
This permanent week reference can be used in project plans, payroll notes, weekly reports, production schedules and deadline documents. Share the week number together with the ISO year and exact date range to avoid ambiguity around New Year.
For calculations that span more than one week, use the weeks between dates calculator. For work schedules, compare the same range with the business days calculator or open the project timeline calculator.
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FAQ
What are the dates for week 17 of 2026?
The dates are April 20, 2026 through April 26, 2026.
What day does this week start?
It starts on Monday.
What day does this week end?
It ends on Sunday.
How should I write this week in a report?
Use “ISO week 17 of 2026 (Apr 20–Apr 26, 2026)” so the week-year and date range are both clear.