ISO week reference
Week 12 2026: March 16–22, 2026
Exact Monday-to-Sunday dates for 2026-W12. Use this week as a calendar reference, open it in the planner, or view it in the full 2026 ISO calendar.
Week12
ISO year2026
Weekdays5
QuarterQ1
ISO reference2026-W12
Starts
Ends
Length7 days
Exact dates
Dates in week 12
ISO weeks run Monday through Sunday.
MonMar 162026
TueMar 172026
WedMar 182026
ThuMar 192026
FriMar 202026
SatMar 212026
SunMar 222026
Use this week
Open Week 12 Planner
Turn these dates into a plan
Open a private weekly planner already set to March 16–22, 2026, then add priorities, deadlines, meetings and hourly work blocks.