Week 20 in 2011

WEEK
21

This week starts on Sunday, May 15, 2011 and ends on Saturday, May 21, 2011.

WEEK EUROPE & ISO
20

This week starts on Monday, May 16, 2011 and ends on Sunday, May 22, 2011.

Week 20 of 2011 begins on May 16, 2011 and ends on May 22, 2011. It covers days 136 to 142 of the year and falls in quarter 2.

Weeks since this week: 802

Week 20 of 2011 at a glance

Starts (Monday)May 16, 2011
Ends (Sunday)May 22, 2011
US week (Sunday to Saturday)21 (May 15, 2011)
MonthMay
QuarterQ2
Days of the year136–142
Year completed at the end of this week38.9%
Weeks left in 2011 after this week32
Weeks in 201152
Even or odd weekEven

Calendar for May 2011

May 2011
SuMoTuWeThFrSa
Week 181234567
Week 19891011121314
Week 2015161718192021
Week 2122232425262728
Week 22293031
USA Calendar

Download Calendar in printable A4 PDF

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  • Print Full Year 2011 Calendar (US version) Open calendar PDF in new window
  • Print Full Year 2011 Calendar (EU/ISO Version) Open calendar PDF in new window

    • All Weeks in 2011:

    Week 1 in 2011 Week 2 in 2011 Week 3 in 2011 Week 4 in 2011 Week 5 in 2011 Week 6 in 2011 Week 7 in 2011 Week 8 in 2011 Week 9 in 2011 Week 10 in 2011 Week 11 in 2011 Week 12 in 2011 Week 13 in 2011 Week 14 in 2011 Week 15 in 2011 Week 16 in 2011 Week 17 in 2011 Week 18 in 2011 Week 19 in 2011 Week 20 in 2011 Week 21 in 2011 Week 22 in 2011 Week 23 in 2011 Week 24 in 2011 Week 25 in 2011 Week 26 in 2011 Week 27 in 2011 Week 28 in 2011 Week 29 in 2011 Week 30 in 2011 Week 31 in 2011 Week 32 in 2011 Week 33 in 2011 Week 34 in 2011 Week 35 in 2011 Week 36 in 2011 Week 37 in 2011 Week 38 in 2011 Week 39 in 2011 Week 40 in 2011 Week 41 in 2011 Week 42 in 2011 Week 43 in 2011 Week 44 in 2011 Week 45 in 2011 Week 46 in 2011 Week 47 in 2011 Week 48 in 2011 Week 49 in 2011 Week 50 in 2011 Week 51 in 2011 Week 52 in 2011

    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 21 of 2011. It runs from May 15, 2011 to May 21, 2011.

    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 2009May 11, 2009May 17, 2009
    Week 20 in 2010May 17, 2010May 23, 2010
    Week 20 in 2012May 14, 2012May 20, 2012
    Week 20 in 2013May 13, 2013May 19, 2013

    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 2011 began on January 3, 2011. 2011 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 2011 start and end?

    Week 20 of 2011 starts on May 16, 2011 and ends on May 22, 2011 (ISO 8601, Monday to Sunday).

    Which month is week 20 of 2011 in?

    Week 20 of 2011 is in May.

    What dates are in week 20 of 2011?

    May 16, 2011, May 17, 2011, May 18, 2011, May 19, 2011, May 20, 2011, May 21, 2011, and May 22, 2011

    How many weeks does 2011 have?

    2011 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 21 of 2011. It runs from May 15, 2011 to May 21, 2011.