Week 52 2021: December 27–2, 2022
Week 52 starts on Monday, December 27, 2021 and ends on Sunday, January 2, 2022.
Quick answer
Week 52 of 2021 is the seven-day ISO week from December 27, 2021 to January 2, 2022. ISO weeks always run from Monday to Sunday.
Use week 52 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.
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FAQ
What are the dates for week 52 of 2021?
The dates are December 27, 2021 through January 2, 2022.
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 52 of 2021 (Dec 27–Jan 2, 2022)” so the week-year and date range are both clear.