Week 39 in 2011

WEEK
40

This week starts on Sunday, September 25, 2011 and ends on Saturday, October 1, 2011.

WEEK EUROPE & ISO
39

This week starts on Monday, September 26, 2011 and ends on Sunday, October 2, 2011.

Week 39 of 2011 begins on September 26, 2011 and ends on October 2, 2011. It covers days 269 to 275 of the year and falls in quarter 3.

Weeks since this week: 783

Week 39 of 2011 at a glance

Starts (Monday)September 26, 2011
Ends (Sunday)October 2, 2011
US week (Sunday to Saturday)40 (September 25, 2011)
MonthSeptember / October
QuarterQ3
Days of the year269–275
Year completed at the end of this week75.3%
Weeks left in 2011 after this week13
Weeks in 201152
Even or odd weekOdd

Calendar for September 2011

September 2011
SuMoTuWeThFrSa
Week 35123
Week 3645678910
Week 3711121314151617
Week 3818192021222324
Week 39252627282930
USA Calendar

Download Calendar in printable A4 PDF

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  • 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 39:

    Week 39 in 2016 Week 39 in 2017 Week 39 in 2018 Week 39 in 2019 Week 39 in 2020 Week 39 in 2021 Week 39 in 2022 Week 39 in 2023 Week 39 in 2024 Week 39 in 2025 Week 39 in 2026 Week 39 in 2027 Week 39 in 2028 Week 39 in 2029 Week 39 in 2030 Week 39 in 2031 Week 39 in 2032 Week 39 in 2033 Week 39 in 2034 Week 39 in 2035 Week 39 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 40 of 2011. It runs from September 25, 2011 to October 1, 2011.

    Even and odd weeks

    Week 39 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 39 in other years

    FromTo
    Week 39 in 2009September 21, 2009September 27, 2009
    Week 39 in 2010September 27, 2010October 3, 2010
    Week 39 in 2012September 24, 2012September 30, 2012
    Week 39 in 2013September 23, 2013September 29, 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 39 of 2011 start and end?

    Week 39 of 2011 starts on September 26, 2011 and ends on October 2, 2011 (ISO 8601, Monday to Sunday).

    Which month is week 39 of 2011 in?

    Week 39 of 2011 starts in September and ends in October.

    What dates are in week 39 of 2011?

    September 26, 2011, September 27, 2011, September 28, 2011, September 29, 2011, September 30, 2011, October 1, 2011, and October 2, 2011

    How many weeks does 2011 have?

    2011 has 52 ISO weeks.

    Is week 39 an even or odd week?

    Week 39 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 40 of 2011. It runs from September 25, 2011 to October 1, 2011.