Week 53 in 2009
Week 53 of 2009 spans the turn of the year: it begins on December 28, 2009 and ends on January 3, 2010.
Weeks since this week: 874
Week 53 of 2009 at a glance
| Starts (Monday) | December 28, 2009 |
|---|---|
| Ends (Sunday) | January 3, 2010 |
| US week (Sunday to Saturday) | 1 (December 27, 2009) |
| Month | December / January |
| Quarter | Q4 |
| Year completed at the end of this week | 100.0% |
| Weeks left in 2009 after this week | 0 |
| Weeks in 2009 | 53 |
| Even or odd week | Odd |
Calendar for December 2009
Download Calendar in printable A4 PDF
(US version) (EU/ISO Version)
All Weeks in 2009:
Past & Future Week Number 53:
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 2010. It runs from December 27, 2009 to January 2, 2010.
Even and odd weeks
Week 53 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.
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 2009 began on December 29, 2008. 2009 has 53 ISO weeks, because 1 January 2009 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 53 of 2009 start and end?
Week 53 of 2009 starts on December 28, 2009 and ends on January 3, 2010 (ISO 8601, Monday to Sunday).
Which month is week 53 of 2009 in?
Week 53 of 2009 starts in December and ends in January.
What dates are in week 53 of 2009?
December 28, 2009, December 29, 2009, December 30, 2009, December 31, 2009, January 1, 2010, January 2, 2010, and January 3, 2010
How many weeks does 2009 have?
2009 has 53 ISO weeks, because 1 January 2009 falls on a Thursday.
Is week 53 an even or odd week?
Week 53 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 1 of 2010. It runs from December 27, 2009 to January 2, 2010.