ISO week reference
Week 49 2025: December 1–7, 2025
Exact Monday-to-Sunday dates for 2025-W49. Use this week as a calendar reference, open it in the planner, or view it in the full 2025 ISO calendar.
Week49
ISO year2025
Weekdays5
QuarterQ4
ISO reference2025-W49
Starts
Ends
Length7 days
Exact dates
Dates in week 49
ISO weeks run Monday through Sunday.
MonDec 12025
TueDec 22025
WedDec 32025
ThuDec 42025
FriDec 52025
SatDec 62025
SunDec 72025
Use this week
Open Week 49 Planner
Turn these dates into a plan
Open a private weekly planner already set to December 1–7, 2025, then add priorities, deadlines, meetings and hourly work blocks.