ISO week reference

Week 21 2025: May 19–25, 2025

Exact Monday-to-Sunday dates for 2025-W21. Use this week as a calendar reference, open it in the planner, or view it in the full 2025 ISO calendar.

Plan This Week Open 2025 Calendar

Week21

ISO year2025

Weekdays5

QuarterQ2

ISO reference2025-W21

StartsMay20255, May 19

Endsth4231405, May 25

Length7 days

Exact dates

Dates in week 21

ISO weeks run Monday through Sunday.

MonMay 192025

TueMay 202025

WedMay 212025

ThuMay 222025

FriMay 232025

SatMay 242025

SunMay 252025

Use this week

Turn these dates into a plan

Open a private weekly planner already set to May 19–25, 2025, then add priorities, deadlines, meetings and hourly work blocks.

Open Week 21 Planner

Year calendarAll 52 ISO weeks in 2025 Quarter viewSee Week 21 inside Q2

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