Week 42 in 1981
Week 42 of 1981 begins on October 12, 1981 and ends on October 18, 1981. It covers days 285 to 291 of the year and falls in quarter 4.
Weeks since this week: 2347
Week 42 of 1981 at a glance
| Starts (Monday) | October 12, 1981 |
|---|---|
| Ends (Sunday) | October 18, 1981 |
| US week (Sunday to Saturday) | 42 (October 11, 1981) |
| Month | October |
| Quarter | Q4 |
| Days of the year | 285–291 |
| Year completed at the end of this week | 79.7% |
| Weeks left in 1981 after this week | 11 |
| Weeks in 1981 | 53 |
| Even or odd week | Even |
Calendar for October 1981
Download Calendar in printable A4 PDF
(US version) (EU/ISO Version)
All Weeks in 1981:
Past & Future Week Number 42:
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 42 of 1981. It runs from October 11, 1981 to October 17, 1981.
Even and odd weeks
Week 42 is an even week. Even and odd week numbers are used for alternating schedules such as shift rotas, school timetables, custody arrangements and waste collection.
Week 42 in other years
| From | To | |
|---|---|---|
| Week 42 in 1979 | October 15, 1979 | October 21, 1979 |
| Week 42 in 1980 | October 13, 1980 | October 19, 1980 |
| Week 42 in 1982 | October 18, 1982 | October 24, 1982 |
| Week 42 in 1983 | October 17, 1983 | October 23, 1983 |
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 1981 began on December 29, 1980. 1981 has 53 ISO weeks, because 1 January 1981 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 42 of 1981 start and end?
Week 42 of 1981 starts on October 12, 1981 and ends on October 18, 1981 (ISO 8601, Monday to Sunday).
Which month is week 42 of 1981 in?
Week 42 of 1981 is in October.
What dates are in week 42 of 1981?
October 12, 1981, October 13, 1981, October 14, 1981, October 15, 1981, October 16, 1981, October 17, 1981, and October 18, 1981
How many weeks does 1981 have?
1981 has 53 ISO weeks, because 1 January 1981 falls on a Thursday.
Is week 42 an even or odd week?
Week 42 is an even 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 42 of 1981. It runs from October 11, 1981 to October 17, 1981.