Week 31 in 1231
Week 31 of 1231 begins on July 28, 1231 and ends on August 3, 1231. It covers days 209 to 215 of the year and falls in quarter 3.
Weeks since this week: 41490
Week 31 of 1231 at a glance
| Starts (Monday) | July 28, 1231 |
|---|---|
| Ends (Sunday) | August 3, 1231 |
| US week (Sunday to Saturday) | 31 (July 27, 1231) |
| Month | July / August |
| Quarter | Q3 |
| Days of the year | 209–215 |
| Year completed at the end of this week | 58.9% |
| Weeks left in 1231 after this week | 21 |
| Weeks in 1231 | 52 |
| Even or odd week | Odd |
Calendar for July 1231
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(US version) (EU/ISO Version)
All Weeks in 1231:
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 1231. It runs from July 27, 1231 to August 2, 1231.
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 1229 | July 30, 1229 | August 5, 1229 |
| Week 31 in 1230 | July 29, 1230 | August 4, 1230 |
| Week 31 in 1232 | July 26, 1232 | August 1, 1232 |
| Week 31 in 1233 | August 1, 1233 | August 7, 1233 |
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 1231 began on December 30, 1230. 1231 has 52 ISO weeks.
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 1231 start and end?
Week 31 of 1231 starts on July 28, 1231 and ends on August 3, 1231 (ISO 8601, Monday to Sunday).
Which month is week 31 of 1231 in?
Week 31 of 1231 starts in July and ends in August.
What dates are in week 31 of 1231?
July 28, 1231, July 29, 1231, July 30, 1231, July 31, 1231, August 1, 1231, August 2, 1231, and August 3, 1231
How many weeks does 1231 have?
1231 has 52 ISO weeks.
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 1231. It runs from July 27, 1231 to August 2, 1231.