ISO week details

Week 21 2020: May 18–24, 2020

Week 21 starts on Monday, May 18, 2020 and ends on Sunday, May 24, 2020.

Week21
ISO year2020
StartMay 18
EndMay 24

Quick answer

Week 21 of 2020 is the seven-day ISO week from May 18, 2020 to May 24, 2020. ISO weeks always run from Monday to Sunday.

Use week 21 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 21 of 2020?

The dates are May 18, 2020 through May 24, 2020.

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 21 of 2020 (May 18–May 24, 2020)” so the week-year and date range are both clear.