ISO week reference
Week 43 2025: October 20–26, 2025
Exact Monday-to-Sunday dates for 2025-W43. Use this week as a calendar reference, open it in the planner, or view it in the full 2025 ISO calendar.
Week43
ISO year2025
Weekdays5
QuarterQ4
ISO reference2025-W43
Starts
Ends
Length7 days
Exact dates
Dates in week 43
ISO weeks run Monday through Sunday.
MonOct 202025
TueOct 212025
WedOct 222025
ThuOct 232025
FriOct 242025
SatOct 252025
SunOct 262025
Use this week
Open Week 43 Planner
Turn these dates into a plan
Open a private weekly planner already set to October 20–26, 2025, then add priorities, deadlines, meetings and hourly work blocks.