Week 51 in 2015
Week 51 of 2015 begins on December 14, 2015 and ends on December 20, 2015. It covers days 348 to 354 of the year and falls in quarter 4.
Weeks since this week: 563
Week 51 of 2015 at a glance
| Starts (Monday) | December 14, 2015 |
|---|---|
| Ends (Sunday) | December 20, 2015 |
| US week (Sunday to Saturday) | 51 (December 13, 2015) |
| Month | December |
| Quarter | Q4 |
| Days of the year | 348–354 |
| Year completed at the end of this week | 97.0% |
| Weeks left in 2015 after this week | 2 |
| Weeks in 2015 | 53 |
| Even or odd week | Odd |
Calendar for December 2015
Download Calendar in printable A4 PDF
(US version) (EU/ISO Version)
All Weeks in 2015:
Past & Future Week Number 51:
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 51 of 2015. It runs from December 13, 2015 to December 19, 2015.
Even and odd weeks
Week 51 is an odd week. Even and odd week numbers are used for alternating schedules such as shift rotas, school timetables, custody arrangements and waste collection.
Week 51 in other years
| From | To | |
|---|---|---|
| Week 51 in 2013 | December 16, 2013 | December 22, 2013 |
| Week 51 in 2014 | December 15, 2014 | December 21, 2014 |
| Week 51 in 2016 | December 19, 2016 | December 25, 2016 |
| Week 51 in 2017 | December 18, 2017 | December 24, 2017 |
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 2015 began on December 29, 2014. 2015 has 53 ISO weeks, because 1 January 2015 falls on a Thursday.
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.
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Frequently Asked Questions (FAQ)
When does week 51 of 2015 start and end?
Week 51 of 2015 starts on December 14, 2015 and ends on December 20, 2015 (ISO 8601, Monday to Sunday).
Which month is week 51 of 2015 in?
Week 51 of 2015 is in December.
What dates are in week 51 of 2015?
December 14, 2015, December 15, 2015, December 16, 2015, December 17, 2015, December 18, 2015, December 19, 2015, and December 20, 2015
How many weeks does 2015 have?
2015 has 53 ISO weeks, because 1 January 2015 falls on a Thursday.
Is week 51 an even or odd week?
Week 51 is an odd 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 51 of 2015. It runs from December 13, 2015 to December 19, 2015.