ISO week reference
Week 43 2026: October 19–25, 2026
Exact Monday-to-Sunday dates for 2026-W43. Use this week as a calendar reference, open it in the planner, or view it in the full 2026 ISO calendar.
Week43
ISO year2026
Weekdays5
QuarterQ4
ISO reference2026-W43
Starts
Ends
Length7 days
Exact dates
Dates in week 43
ISO weeks run Monday through Sunday.
MonOct 192026
TueOct 202026
WedOct 212026
ThuOct 222026
FriOct 232026
SatOct 242026
SunOct 252026
Use this week
Open Week 43 Planner
Turn these dates into a plan
Open a private weekly planner already set to October 19–25, 2026, then add priorities, deadlines, meetings and hourly work blocks.