Week 49 in 1231
Week 49 of 1231 begins on December 1, 1231 and ends on December 7, 1231. It covers days 335 to 341 of the year and falls in quarter 4.
Weeks since this week: 41472
Week 49 of 1231 at a glance
| Starts (Monday) | December 1, 1231 |
|---|---|
| Ends (Sunday) | December 7, 1231 |
| US week (Sunday to Saturday) | 49 (November 30, 1231) |
| Month | December |
| Quarter | Q4 |
| Days of the year | 335–341 |
| Year completed at the end of this week | 93.4% |
| Weeks left in 1231 after this week | 3 |
| Weeks in 1231 | 52 |
| Even or odd week | Odd |
Calendar for December 1231
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(US version) (EU/ISO Version)
All Weeks in 1231:
Past & Future Week Number 49:
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 49 of 1231. It runs from November 30, 1231 to December 6, 1231.
Even and odd weeks
Week 49 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 49 in other years
| From | To | |
|---|---|---|
| Week 49 in 1229 | December 3, 1229 | December 9, 1229 |
| Week 49 in 1230 | December 2, 1230 | December 8, 1230 |
| Week 49 in 1232 | November 29, 1232 | December 5, 1232 |
| Week 49 in 1233 | December 5, 1233 | December 11, 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 49 of 1231 start and end?
Week 49 of 1231 starts on December 1, 1231 and ends on December 7, 1231 (ISO 8601, Monday to Sunday).
Which month is week 49 of 1231 in?
Week 49 of 1231 is in December.
What dates are in week 49 of 1231?
December 1, 1231, December 2, 1231, December 3, 1231, December 4, 1231, December 5, 1231, December 6, 1231, and December 7, 1231
How many weeks does 1231 have?
1231 has 52 ISO weeks.
Is week 49 an even or odd week?
Week 49 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 49 of 1231. It runs from November 30, 1231 to December 6, 1231.