Week 20 2026: May 11–17, 2026
Week 20 starts on Monday, May 11, 2026 and ends on Sunday, May 17, 2026.
Quick answer
Week 20 of 2026 is the seven-day ISO week from May 11, 2026 to May 17, 2026. ISO weeks always run from Monday to Sunday.
Use week 20 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.
Weeks around week 20
Browse priority week calendars
Continue with a planning tool
FAQ
What are the dates for week 20 of 2026?
The dates are May 11, 2026 through May 17, 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 20 of 2026 (May 11–May 17, 2026)” so the week-year and date range are both clear.