ISO week reference
Week 12 2025: March 17–23, 2025
Exact Monday-to-Sunday dates for 2025-W12. Use this week as a calendar reference, open it in the planner, or view it in the full 2025 ISO calendar.
Week12
ISO year2025
Weekdays5
QuarterQ1
ISO reference2025-W12
Starts
Ends
Length7 days
Exact dates
Dates in week 12
ISO weeks run Monday through Sunday.
MonMar 172025
TueMar 182025
WedMar 192025
ThuMar 202025
FriMar 212025
SatMar 222025
SunMar 232025
Use this week
Open Week 12 Planner
Turn these dates into a plan
Open a private weekly planner already set to March 17–23, 2025, then add priorities, deadlines, meetings and hourly work blocks.