ISO week details

Week 50 2011: December 12–18, 2011

Week 50 starts on Monday, December 12, 2011 and ends on Sunday, December 18, 2011.

Week50
ISO year2011
StartDec 12
EndDec 18

Quick answer

Week 50 of 2011 is the seven-day ISO week from December 12, 2011 to December 18, 2011. ISO weeks always run from Monday to Sunday.

Use week 50 in professional planning

This permanent week reference can be used in project plans, payroll notes, weekly reports, production schedules and deadline documents. Share the week number together with the ISO year and exact date range to avoid ambiguity around New Year.

For calculations that span more than one week, use the weeks between dates calculator. For work schedules, compare the same range with the business days calculator or open the project timeline calculator.

FAQ

What are the dates for week 50 of 2011?

The dates are December 12, 2011 through December 18, 2011.

What day does this week start?

It starts on Monday.

What day does this week end?

It ends on Sunday.

How should I write this week in a report?

Use “ISO week 50 of 2011 (Dec 12–Dec 18, 2011)” so the week-year and date range are both clear.