Week 43 in 1231
Week 43 of 1231 begins on October 20, 1231 and ends on October 26, 1231. It covers days 293 to 299 of the year and falls in quarter 4.
Weeks since this week: 41478
Week 43 of 1231 at a glance
| Starts (Monday) | October 20, 1231 |
|---|---|
| Ends (Sunday) | October 26, 1231 |
| US week (Sunday to Saturday) | 43 (October 19, 1231) |
| Month | October |
| Quarter | Q4 |
| Days of the year | 293–299 |
| Year completed at the end of this week | 81.9% |
| Weeks left in 1231 after this week | 9 |
| Weeks in 1231 | 52 |
| Even or odd week | Odd |
Calendar for October 1231
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(US version) (EU/ISO Version)
All Weeks in 1231:
Past & Future Week Number 43:
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 43 of 1231. It runs from October 19, 1231 to October 25, 1231.
Even and odd weeks
Week 43 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 43 in other years
| From | To | |
|---|---|---|
| Week 43 in 1229 | October 22, 1229 | October 28, 1229 |
| Week 43 in 1230 | October 21, 1230 | October 27, 1230 |
| Week 43 in 1232 | October 18, 1232 | October 24, 1232 |
| Week 43 in 1233 | October 24, 1233 | October 30, 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 43 of 1231 start and end?
Week 43 of 1231 starts on October 20, 1231 and ends on October 26, 1231 (ISO 8601, Monday to Sunday).
Which month is week 43 of 1231 in?
Week 43 of 1231 is in October.
What dates are in week 43 of 1231?
October 20, 1231, October 21, 1231, October 22, 1231, October 23, 1231, October 24, 1231, October 25, 1231, and October 26, 1231
How many weeks does 1231 have?
1231 has 52 ISO weeks.
Is week 43 an even or odd week?
Week 43 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 43 of 1231. It runs from October 19, 1231 to October 25, 1231.