Week 18 in 1980
Week 18 of 1980 begins on April 28, 1980 and ends on May 4, 1980. It covers days 119 to 125 of the year and falls in quarter 2.
Weeks since this week: 2422
Week 18 of 1980 at a glance
| Starts (Monday) | April 28, 1980 |
|---|---|
| Ends (Sunday) | May 4, 1980 |
| US week (Sunday to Saturday) | 18 (April 27, 1980) |
| Month | April / May |
| Quarter | Q2 |
| Days of the year | 119–125 |
| Year completed at the end of this week | 34.2% |
| Weeks left in 1980 after this week | 34 |
| Weeks in 1980 | 52 |
| Even or odd week | Even |
Calendar for April 1980
Download Calendar in printable A4 PDF
(US version) (EU/ISO Version)
All Weeks in 1980:
Past & Future Week Number 18:
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 18 of 1980. It runs from April 27, 1980 to May 3, 1980.
Even and odd weeks
Week 18 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 18 in other years
| From | To | |
|---|---|---|
| Week 18 in 1978 | May 1, 1978 | May 7, 1978 |
| Week 18 in 1979 | April 30, 1979 | May 6, 1979 |
| Week 18 in 1981 | April 27, 1981 | May 3, 1981 |
| Week 18 in 1982 | May 3, 1982 | May 9, 1982 |
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 1980 began on December 31, 1979. 1980 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 18 of 1980 start and end?
Week 18 of 1980 starts on April 28, 1980 and ends on May 4, 1980 (ISO 8601, Monday to Sunday).
Which month is week 18 of 1980 in?
Week 18 of 1980 starts in April and ends in May.
What dates are in week 18 of 1980?
April 28, 1980, April 29, 1980, April 30, 1980, May 1, 1980, May 2, 1980, May 3, 1980, and May 4, 1980
How many weeks does 1980 have?
1980 has 52 ISO weeks.
Is week 18 an even or odd week?
Week 18 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 18 of 1980. It runs from April 27, 1980 to May 3, 1980.