ISO week reference
Week 3 2026: January 12–18, 2026
Exact Monday-to-Sunday dates for 2026-W03. Use this week as a calendar reference, open it in the planner, or view it in the full 2026 ISO calendar.
Week3
ISO year2026
Weekdays5
QuarterQ1
ISO reference2026-W03
Starts
Ends
Length7 days
Exact dates
Dates in week 3
ISO weeks run Monday through Sunday.
MonJan 122026
TueJan 132026
WedJan 142026
ThuJan 152026
FriJan 162026
SatJan 172026
SunJan 182026
Use this week
Open Week 3 Planner
Turn these dates into a plan
Open a private weekly planner already set to January 12–18, 2026, then add priorities, deadlines, meetings and hourly work blocks.