Week 20 in 1999

WEEK
21

This week starts on Sunday, May 16, 1999 and ends on Saturday, May 22, 1999.

WEEK EUROPE & ISO
20

This week starts on Monday, May 17, 1999 and ends on Sunday, May 23, 1999.

Week 20 of 1999 begins on May 17, 1999 and ends on May 23, 1999. It covers days 137 to 143 of the year and falls in quarter 2.

Weeks since this week: 1428

Week 20 of 1999 at a glance

Starts (Monday)May 17, 1999
Ends (Sunday)May 23, 1999
US week (Sunday to Saturday)21 (May 16, 1999)
MonthMay
QuarterQ2
Days of the year137–143
Year completed at the end of this week39.2%
Weeks left in 1999 after this week32
Weeks in 199952
Even or odd weekEven

Calendar for May 1999

May 1999
SuMoTuWeThFrSa
Week 171
Week 182345678
Week 199101112131415
Week 2016171819202122
Week 2123242526272829
Week 223031
USA Calendar

Download Calendar in printable A4 PDF

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    • All Weeks in 1999:

    Week 1 in 1999 Week 2 in 1999 Week 3 in 1999 Week 4 in 1999 Week 5 in 1999 Week 6 in 1999 Week 7 in 1999 Week 8 in 1999 Week 9 in 1999 Week 10 in 1999 Week 11 in 1999 Week 12 in 1999 Week 13 in 1999 Week 14 in 1999 Week 15 in 1999 Week 16 in 1999 Week 17 in 1999 Week 18 in 1999 Week 19 in 1999 Week 20 in 1999 Week 21 in 1999 Week 22 in 1999 Week 23 in 1999 Week 24 in 1999 Week 25 in 1999 Week 26 in 1999 Week 27 in 1999 Week 28 in 1999 Week 29 in 1999 Week 30 in 1999 Week 31 in 1999 Week 32 in 1999 Week 33 in 1999 Week 34 in 1999 Week 35 in 1999 Week 36 in 1999 Week 37 in 1999 Week 38 in 1999 Week 39 in 1999 Week 40 in 1999 Week 41 in 1999 Week 42 in 1999 Week 43 in 1999 Week 44 in 1999 Week 45 in 1999 Week 46 in 1999 Week 47 in 1999 Week 48 in 1999 Week 49 in 1999 Week 50 in 1999 Week 51 in 1999 Week 52 in 1999

    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 1999. It runs from May 16, 1999 to May 22, 1999.

    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 1997May 12, 1997May 18, 1997
    Week 20 in 1998May 11, 1998May 17, 1998
    Week 20 in 2000May 15, 2000May 21, 2000
    Week 20 in 2001May 14, 2001May 20, 2001

    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 1999 began on January 4, 1999. 1999 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 1999 start and end?

    Week 20 of 1999 starts on May 17, 1999 and ends on May 23, 1999 (ISO 8601, Monday to Sunday).

    Which month is week 20 of 1999 in?

    Week 20 of 1999 is in May.

    What dates are in week 20 of 1999?

    May 17, 1999, May 18, 1999, May 19, 1999, May 20, 1999, May 21, 1999, May 22, 1999, and May 23, 1999

    How many weeks does 1999 have?

    1999 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 1999. It runs from May 16, 1999 to May 22, 1999.