ISO week details

Week 21 1826: May 22–28, 1826

Week 21 starts on Monday, May 22, 1826 and ends on Sunday, May 28, 1826.

Week21
ISO year1826
StartMay 22
EndMay 28

Quick answer

Week 21 of 1826 is the seven-day ISO week from May 22, 1826 to May 28, 1826. 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 1826?

The dates are May 22, 1826 through May 28, 1826.

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 1826 (May 22–May 28, 1826)” so the week-year and date range are both clear.