ISO week reference
Week 1 2025: December 30, 2024 – January 5, 2025
Exact Monday-to-Sunday dates for 2025-W01. Use this week as a calendar reference, open it in the planner, or view it in the full 2025 ISO calendar.
Week1
ISO year2025
Weekdays5
QuarterQ4
ISO reference2025-W01
Starts
Ends
Length7 days
Exact dates
Dates in week 1
ISO weeks run Monday through Sunday.
MonDec 302024
TueDec 312024
WedJan 12025
ThuJan 22025
FriJan 32025
SatJan 42025
SunJan 52025
Use this week
Open Week 1 Planner
Turn these dates into a plan
Open a private weekly planner already set to December 30, 2024 – January 5, 2025, then add priorities, deadlines, meetings and hourly work blocks.