ISO week reference

Week 51 2027: December 20–26, 2027

Exact Monday-to-Sunday dates for 2027-W51. Use this week as a calendar reference, open it in the planner, or view it in the full 2027 ISO calendar.

Plan This Week Open 2027 Calendar

Week51

ISO year2027

Weekdays5

QuarterQ4

ISO reference2027-W51

StartsDec202712, Dec 20

Endsth92618412, Dec 26

Length7 days

Exact dates

Dates in week 51

ISO weeks run Monday through Sunday.

MonDec 202027

TueDec 212027

WedDec 222027

ThuDec 232027

FriDec 242027

SatDec 252027

SunDec 262027

Use this week

Turn these dates into a plan

Open a private weekly planner already set to December 20–26, 2027, then add priorities, deadlines, meetings and hourly work blocks.

Open Week 51 Planner

Year calendarAll 52 ISO weeks in 2027 Quarter viewSee Week 51 inside Q4

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