Week 20 2025: May 12–18, 2025
Week 20 starts on Monday, May 12, 2025 and ends on Sunday, May 18, 2025.
Quick answer
Week 20 of 2025 is the seven-day ISO week from May 12, 2025 to May 18, 2025. 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.
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FAQ
What are the dates for week 20 of 2025?
The dates are May 12, 2025 through May 18, 2025.
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 2025 (May 12–May 18, 2025)” so the week-year and date range are both clear.