ISO week reference

Week 40 2027: October 4–10, 2027

Exact Monday-to-Sunday dates for 2027-W40. 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

Week40

ISO year2027

Weekdays5

QuarterQ4

ISO reference2027-W40

StartsOct202710, Oct 4

Endsth96338110, Oct 10

Length7 days

Exact dates

Dates in week 40

ISO weeks run Monday through Sunday.

MonOct 42027

TueOct 52027

WedOct 62027

ThuOct 72027

FriOct 82027

SatOct 92027

SunOct 102027

Use this week

Turn these dates into a plan

Open a private weekly planner already set to October 4–10, 2027, then add priorities, deadlines, meetings and hourly work blocks.

Open Week 40 Planner

Year calendarAll 52 ISO weeks in 2027 Quarter viewSee Week 40 inside Q4

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