ISO week reference
Week 5 2026: January 26, 2026 – February 1, 2026
Exact Monday-to-Sunday dates for 2026-W05. Use this week as a calendar reference, open it in the planner, or view it in the full 2026 ISO calendar.
Week5
ISO year2026
Weekdays5
QuarterQ1
ISO reference2026-W05
Starts
Ends
Length7 days
Exact dates
Dates in week 5
ISO weeks run Monday through Sunday.
MonJan 262026
TueJan 272026
WedJan 282026
ThuJan 292026
FriJan 302026
SatJan 312026
SunFeb 12026
Use this week
Open Week 5 Planner
Turn these dates into a plan
Open a private weekly planner already set to January 26, 2026 – February 1, 2026, then add priorities, deadlines, meetings and hourly work blocks.