Week 52 in 2021
Week 52 of 2021 spans the turn of the year: it begins on December 27, 2021 and ends on January 2, 2022.
Weeks since this week: 250
Week 52 of 2021 at a glance
| Starts (Monday) | December 27, 2021 |
|---|---|
| Ends (Sunday) | January 2, 2022 |
| US week (Sunday to Saturday) | 1 (December 26, 2021) |
| Month | December / January |
| Quarter | Q4 |
| Year completed at the end of this week | 100.0% |
| Weeks left in 2021 after this week | 0 |
| Weeks in 2021 | 52 |
| Even or odd week | Even |
Calendar for December 2021
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(US version) (EU/ISO Version)
All Weeks in 2021:
Past & Future Week Number 52:
US and ISO week numbers
In the US system, where weeks start on Sunday and week 1 is the week that contains 1 January, this is week 1 of 2022. It runs from December 26, 2021 to January 1, 2022.
Even and odd weeks
Week 52 is an even week. Even and odd week numbers are used for alternating schedules such as shift rotas, school timetables, custody arrangements and waste collection.
Week 52 in other years
| From | To | |
|---|---|---|
| Week 52 in 2019 | December 23, 2019 | December 29, 2019 |
| Week 52 in 2020 | December 21, 2020 | December 27, 2020 |
| Week 52 in 2022 | December 26, 2022 | January 1, 2023 |
| Week 52 in 2023 | December 25, 2023 | December 31, 2023 |
How week numbers are counted
Most of the world numbers weeks according to the ISO 8601 standard. A week starts on Monday, and week 1 is the week that contains the first Thursday of the year, which is always the week that contains 4 January.
Week 1 of 2021 began on January 4, 2021. 2021 has 52 ISO weeks.
Because of this rule, the first days of January can belong to the last week of the previous year, and the last days of December can belong to week 1 of the next year.
In the United States, weeks usually start on Sunday and week 1 is the week that contains 1 January, so the US week number can differ from the ISO week number.
Find the week number of a date
Frequently Asked Questions (FAQ)
When does week 52 of 2021 start and end?
Week 52 of 2021 starts on December 27, 2021 and ends on January 2, 2022 (ISO 8601, Monday to Sunday).
Which month is week 52 of 2021 in?
Week 52 of 2021 starts in December and ends in January.
What dates are in week 52 of 2021?
December 27, 2021, December 28, 2021, December 29, 2021, December 30, 2021, December 31, 2021, January 1, 2022, and January 2, 2022
How many weeks does 2021 have?
2021 has 52 ISO weeks.
Is week 52 an even or odd week?
Week 52 is an even week.
What is the US week number for this week?
In the US system, where weeks start on Sunday and week 1 is the week that contains 1 January, this is week 1 of 2022. It runs from December 26, 2021 to January 1, 2022.