Week 51 of 2023 runs December 18, 2023 to December 24, 2023.
Week 51 starts on Monday, December 18, 2023 and ends on Sunday, December 24, 2023. It's the 352nd day of the year, sits in Q4, and falls in December. By the end of this week, 358 of 365 days are gone, putting 2023 at 98.1%.
There are no public holidays this week, so all 5 weekdays are working days. Need a different week? Browse the full 2023 week calendar, or jump to this week's number.
Week 51 at a glance
The 7 days of week 51
Every date in week 51 of 2023, Monday through Sunday, with day-of-year numbers and events.
| Day | Date | Day no. | Type | Events |
|---|---|---|---|---|
| Monday | Day 352 | Weekday | ||
| Tuesday | Day 353 | Weekday | ||
| Wednesday | Day 354 | Weekday | ||
| Thursday | Day 355 | Weekday | Winter Solstice | |
| Friday | Day 356 | Weekday | ||
| Saturday | Day 357 | Weekend | ||
| Sunday | Day 358 | Weekend |
What week 51 of 2023 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 51 is one piece of that system.
In 2023, week 51 covers Dec 18 – Dec 24, 2023. That's December, deep in Q4. The same week number shifts by a day or two each year, so week 51 in 2024 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 51 of 2023
🇺🇸 United States
🇬🇧 United Kingdom
🇨🇦 Canada
🇦🇺 Australia
Week 51 across years
The same ISO week number lands on different dates each year. Here's how week 51 shifts.
Week 51 of 2023: questions and answers
What days are in week 51 of 2023?
Week 51 of 2023 runs from December 18, 2023 (Monday) through December 24, 2023 (Sunday). It spans December.
What month is week 51 in 2023?
Week 51 of 2023 falls entirely in December 2023.
How many working days are in week 51 of 2023?
Week 51 of 2023 has 5 working days.
What week is Winter Solstice in 2023?
Winter Solstice falls in ISO week 51 of 2023 (Dec 18 – Dec 24, 2023).
What quarter is week 51 of 2023 in?
Week 51 of 2023 is in Q4 (2023). The week starts on day 352 of 365.
What is ISO week 51?
ISO week 51 is defined by the ISO 8601 international standard. It begins on Monday, December 18, 2023, and ends on Sunday, December 24, 2023. It is week 98% through the ISO year 2023.