Week 25 in 1981
Week 25 of 1981 begins on June 15, 1981 and ends on June 21, 1981. It covers days 166 to 172 of the year and falls in quarter 2.
Weeks since this week: 2365
Week 25 of 1981 at a glance
| Starts (Monday) | June 15, 1981 |
|---|---|
| Ends (Sunday) | June 21, 1981 |
| US week (Sunday to Saturday) | 25 (June 14, 1981) |
| Month | June |
| Quarter | Q2 |
| Days of the year | 166–172 |
| Year completed at the end of this week | 47.1% |
| Weeks left in 1981 after this week | 28 |
| Weeks in 1981 | 53 |
| Even or odd week | Odd |
Calendar for June 1981
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(US version) (EU/ISO Version)
All Weeks in 1981:
Past & Future Week Number 25:
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 25 of 1981. It runs from June 14, 1981 to June 20, 1981.
Even and odd weeks
Week 25 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 25 in other years
| From | To | |
|---|---|---|
| Week 25 in 1979 | June 18, 1979 | June 24, 1979 |
| Week 25 in 1980 | June 16, 1980 | June 22, 1980 |
| Week 25 in 1982 | June 21, 1982 | June 27, 1982 |
| Week 25 in 1983 | June 20, 1983 | June 26, 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.
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Frequently Asked Questions (FAQ)
When does week 25 of 1981 start and end?
Week 25 of 1981 starts on June 15, 1981 and ends on June 21, 1981 (ISO 8601, Monday to Sunday).
Which month is week 25 of 1981 in?
Week 25 of 1981 is in June.
What dates are in week 25 of 1981?
June 15, 1981, June 16, 1981, June 17, 1981, June 18, 1981, June 19, 1981, June 20, 1981, and June 21, 1981
How many weeks does 1981 have?
1981 has 53 ISO weeks, because 1 January 1981 falls on a Thursday.
Is week 25 an even or odd week?
Week 25 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 25 of 1981. It runs from June 14, 1981 to June 20, 1981.