ISO week reference

Week 40 1980: September 29, 1980 – October 5, 1980

Exact Monday-to-Sunday dates for 1980-W40. Use this week as a calendar reference, open it in the planner, or view it in the full 1980 ISO calendar.

Plan This Week Open 1980 Calendar

Week40

ISO year1980

Weekdays5

QuarterQ3

ISO reference1980-W40

StartsSep19809, Sep 29

Endsth85384510, Oct 5

Length7 days

Exact dates

Dates in week 40

ISO weeks run Monday through Sunday.

MonSep 291980

TueSep 301980

WedOct 11980

ThuOct 21980

FriOct 31980

SatOct 41980

SunOct 51980

Use this week

Turn these dates into a plan

Open a private weekly planner already set to September 29, 1980 – October 5, 1980, then add priorities, deadlines, meetings and hourly work blocks.

Open Week 40 Planner

Year calendarAll 52 ISO weeks in 1980 Quarter viewSee Week 40 inside Q3

PreviousWeek 39, 1980Sep 22–Sep 28 Year calendar1980 ISO week calendarBrowse every week and exact date range NextWeek 41, 1980Oct 6–Oct 12