ISO Week · 2027 · Q4
Week 52
2027 · –
December / January · 4 working days · 100% through 2027
Week 52 of 2027 runs December 27, 2027 to January 2, 2028.
Week 52 starts on Monday, December 27, 2027 and ends on Sunday, January 2, 2028. It's the 361st day of the year, sits in Q4, and falls in December / January. By the end of this week, 2 of 365 days are gone, putting 2027 at 0.5%.
This week includes New Year's Day, New Year's Eve, so it has 4 working days instead of the usual 5. Need a different week? Browse the full 2027 week calendar, or jump to this week's number.
Week 52 at a glance
The 7 days of week 52
Every date in week 52 of 2027, Monday through Sunday, with day-of-year numbers and events.
| Day | Date | Day no. | Type | Events |
|---|---|---|---|---|
| Monday | Day 361 | Weekday | ||
| Tuesday | Day 362 | Weekday | ||
| Wednesday | Day 363 | Weekday | ||
| Thursday | Day 364 | Weekday | ||
| Friday | Day 365 | Weekday | New Year's Eve | |
| Saturday | Day 1 | Weekend | ||
| Sunday | Day 2 | Weekend |
What week 52 of 2027 means
ISO 8601 numbers weeks so every week starts on Monday and ends on Sunday. Week 1 is the one holding the year's first Thursday, which is why early January can land in week 52 or 53 of the previous year. Week 52 is one piece of that system.
In 2027, week 52 covers Dec 27 – Jan 2, 2028. That's December / January, deep in Q4. The same week number shifts by a day or two each year, so week 52 in 2028 won't share these exact dates. The table below shows how it moves.
Want to check a specific date instead of a week number? The week calculator converts any date to its ISO week. Curious how many weeks a year holds? The weeks in a year guide explains 52 versus 53. And the ISO week number page covers the standard end to end.
Holidays in week 52 of 2027
🇬🇧 United Kingdom
Christmas Bank Holiday
BankBoxing Day Bank Holiday
BankWeek 52 across years
The same ISO week number lands on different dates each year. Here's how week 52 shifts.
| Year | From (Mon) | To (Sun) | Notable | |
|---|---|---|---|---|
| 2024 | Christmas Day | view → | ||
| 2025 | Christmas Day | view → | ||
| 2026 | Christmas Day | view → | ||
| 2027 THIS YEAR | New Year's Day | |||
| 2028 | New Year's Day Christmas Day | view → | ||
| 2029 | Christmas Day | view → | ||
| 2030 | Christmas Day | view → |
Week 52 of 2027: questions and answers
What days are in week 52 of 2027?
Week 52 of 2027 runs from December 27, 2027 (Monday) through January 2, 2028 (Sunday). It spans December / January.
What month is week 52 in 2027?
Week 52 of 2027 spans two months: it starts in December and ends in January 2027.
How many working days are in week 52 of 2027?
Week 52 of 2027 has 4 working days — reduced from 5 due to New Year's Day falling on a weekday.
What week is New Year's Day in 2027?
New Year's Day falls in ISO week 52 of 2027 (Dec 27 – Jan 2, 2028).
What quarter is week 52 of 2027 in?
Week 52 of 2027 is in Q4 (2027). The week starts on day 361 of 365.
What is ISO week 52?
ISO week 52 is defined by the ISO 8601 international standard. It begins on Monday, December 27, 2027, and ends on Sunday, January 2, 2028. It is week 100% through the ISO year 2027.