Week 20 in 1980

WEEK
20

This week starts on Sunday, May 11, 1980 and ends on Saturday, May 17, 1980.

WEEK EUROPE & ISO
20

This week starts on Monday, May 12, 1980 and ends on Sunday, May 18, 1980.

Week 20 of 1980 begins on May 12, 1980 and ends on May 18, 1980. It covers days 133 to 139 of the year and falls in quarter 2.

Weeks since this week: 2420

Week 20 of 1980 at a glance

Starts (Monday)May 12, 1980
Ends (Sunday)May 18, 1980
US week (Sunday to Saturday)20 (May 11, 1980)
MonthMay
QuarterQ2
Days of the year133–139
Year completed at the end of this week38.0%
Weeks left in 1980 after this week32
Weeks in 198052
Even or odd weekEven

Calendar for May 1980

May 1980
SuMoTuWeThFrSa
Week 18123
Week 1945678910
Week 2011121314151617
Week 2118192021222324
Week 2225262728293031
USA Calendar

Download Calendar in printable A4 PDF

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  • Print Full Year 1980 Calendar (US version) Open calendar PDF in new window
  • Print Full Year 1980 Calendar (EU/ISO Version) Open calendar PDF in new window

    • All Weeks in 1980:

    Week 1 in 1980 Week 2 in 1980 Week 3 in 1980 Week 4 in 1980 Week 5 in 1980 Week 6 in 1980 Week 7 in 1980 Week 8 in 1980 Week 9 in 1980 Week 10 in 1980 Week 11 in 1980 Week 12 in 1980 Week 13 in 1980 Week 14 in 1980 Week 15 in 1980 Week 16 in 1980 Week 17 in 1980 Week 18 in 1980 Week 19 in 1980 Week 20 in 1980 Week 21 in 1980 Week 22 in 1980 Week 23 in 1980 Week 24 in 1980 Week 25 in 1980 Week 26 in 1980 Week 27 in 1980 Week 28 in 1980 Week 29 in 1980 Week 30 in 1980 Week 31 in 1980 Week 32 in 1980 Week 33 in 1980 Week 34 in 1980 Week 35 in 1980 Week 36 in 1980 Week 37 in 1980 Week 38 in 1980 Week 39 in 1980 Week 40 in 1980 Week 41 in 1980 Week 42 in 1980 Week 43 in 1980 Week 44 in 1980 Week 45 in 1980 Week 46 in 1980 Week 47 in 1980 Week 48 in 1980 Week 49 in 1980 Week 50 in 1980 Week 51 in 1980 Week 52 in 1980

    Past & Future Week Number 20:

    Week 20 in 2016 Week 20 in 2017 Week 20 in 2018 Week 20 in 2019 Week 20 in 2020 Week 20 in 2021 Week 20 in 2022 Week 20 in 2023 Week 20 in 2024 Week 20 in 2025 Week 20 in 2026 Week 20 in 2027 Week 20 in 2028 Week 20 in 2029 Week 20 in 2030 Week 20 in 2031 Week 20 in 2032 Week 20 in 2033 Week 20 in 2034 Week 20 in 2035 Week 20 in 2036

    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 20 of 1980. It runs from May 11, 1980 to May 17, 1980.

    Even and odd weeks

    Week 20 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 20 in other years

    FromTo
    Week 20 in 1978May 15, 1978May 21, 1978
    Week 20 in 1979May 14, 1979May 20, 1979
    Week 20 in 1981May 11, 1981May 17, 1981
    Week 20 in 1982May 17, 1982May 23, 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 20 of 1980 start and end?

    Week 20 of 1980 starts on May 12, 1980 and ends on May 18, 1980 (ISO 8601, Monday to Sunday).

    Which month is week 20 of 1980 in?

    Week 20 of 1980 is in May.

    What dates are in week 20 of 1980?

    May 12, 1980, May 13, 1980, May 14, 1980, May 15, 1980, May 16, 1980, May 17, 1980, and May 18, 1980

    How many weeks does 1980 have?

    1980 has 52 ISO weeks.

    Is week 20 an even or odd week?

    Week 20 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 20 of 1980. It runs from May 11, 1980 to May 17, 1980.