Week 31 in 2009
Week 31 of 2009 begins on July 27, 2009 and ends on August 2, 2009. It covers days 208 to 214 of the year and falls in quarter 3.
Weeks since this week: 896
Week 31 of 2009 at a glance
| Starts (Monday) | July 27, 2009 |
|---|---|
| Ends (Sunday) | August 2, 2009 |
| US week (Sunday to Saturday) | 31 (July 26, 2009) |
| Month | July / August |
| Quarter | Q3 |
| Days of the year | 208–214 |
| Year completed at the end of this week | 58.6% |
| Weeks left in 2009 after this week | 22 |
| Weeks in 2009 | 53 |
| Even or odd week | Odd |
Calendar for July 2009
Download Calendar in printable A4 PDF
(US version) (EU/ISO Version)
All Weeks in 2009:
Past & Future Week Number 31:
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 31 of 2009. It runs from July 26, 2009 to August 1, 2009.
Even and odd weeks
Week 31 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 31 in other years
| From | To | |
|---|---|---|
| Week 31 in 2007 | July 30, 2007 | August 5, 2007 |
| Week 31 in 2008 | July 28, 2008 | August 3, 2008 |
| Week 31 in 2010 | August 2, 2010 | August 8, 2010 |
| Week 31 in 2011 | August 1, 2011 | August 7, 2011 |
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.
Find the week number of a date
Frequently Asked Questions (FAQ)
When does week 31 of 2009 start and end?
Week 31 of 2009 starts on July 27, 2009 and ends on August 2, 2009 (ISO 8601, Monday to Sunday).
Which month is week 31 of 2009 in?
Week 31 of 2009 starts in July and ends in August.
What dates are in week 31 of 2009?
July 27, 2009, July 28, 2009, July 29, 2009, July 30, 2009, July 31, 2009, August 1, 2009, and August 2, 2009
How many weeks does 2009 have?
2009 has 53 ISO weeks, because 1 January 2009 falls on a Thursday.
Is week 31 an even or odd week?
Week 31 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 31 of 2009. It runs from July 26, 2009 to August 1, 2009.