Week 1 in 505

WEEK
1

This week starts on Sunday, December 28, 504 and ends on Saturday, January 3, 505.

WEEK EUROPE & ISO
1

This week starts on Monday, December 29, 504 and ends on Sunday, January 4, 505.

Week 1 of 505 spans the turn of the year: it begins on December 29, 504 and ends on January 4, 505.

Weeks since this week: 79401

Week 1 of 505 at a glance

Starts (Monday)December 29, 504
Ends (Sunday)January 4, 505
US week (Sunday to Saturday)1 (December 28, 504)
MonthDecember / January
QuarterQ1
Year completed at the end of this week1.1%
Weeks left in 505 after this week52
Weeks in 50553
Even or odd weekOdd

Calendar for December 505

December 505
SuMoTuWeThFrSa
Week 4912345
Week 506789101112
Week 5113141516171819
Week 5220212223242526
Week 12728293031
USA Calendar

Download Calendar in printable A4 PDF

  • Print December 505 Calendar Open calendar PDF in new window (US version)
  • Print December 505 Calendar Open calendar PDF in new window (EU/ISO Version)
  • Print Full Year 505 Calendar (US version) Open calendar PDF in new window
  • Print Full Year 505 Calendar (EU/ISO Version) Open calendar PDF in new window

    • All Weeks in 505:

    Week 1 in 505 Week 2 in 505 Week 3 in 505 Week 4 in 505 Week 5 in 505 Week 6 in 505 Week 7 in 505 Week 8 in 505 Week 9 in 505 Week 10 in 505 Week 11 in 505 Week 12 in 505 Week 13 in 505 Week 14 in 505 Week 15 in 505 Week 16 in 505 Week 17 in 505 Week 18 in 505 Week 19 in 505 Week 20 in 505 Week 21 in 505 Week 22 in 505 Week 23 in 505 Week 24 in 505 Week 25 in 505 Week 26 in 505 Week 27 in 505 Week 28 in 505 Week 29 in 505 Week 30 in 505 Week 31 in 505 Week 32 in 505 Week 33 in 505 Week 34 in 505 Week 35 in 505 Week 36 in 505 Week 37 in 505 Week 38 in 505 Week 39 in 505 Week 40 in 505 Week 41 in 505 Week 42 in 505 Week 43 in 505 Week 44 in 505 Week 45 in 505 Week 46 in 505 Week 47 in 505 Week 48 in 505 Week 49 in 505 Week 50 in 505 Week 51 in 505 Week 52 in 505 Week 53 in 505

    Past & Future Week Number 1:

    Week 1 in 2016 Week 1 in 2017 Week 1 in 2018 Week 1 in 2019 Week 1 in 2020 Week 1 in 2021 Week 1 in 2022 Week 1 in 2023 Week 1 in 2024 Week 1 in 2025 Week 1 in 2026 Week 1 in 2027 Week 1 in 2028 Week 1 in 2029 Week 1 in 2030 Week 1 in 2031 Week 1 in 2032 Week 1 in 2033 Week 1 in 2034 Week 1 in 2035 Week 1 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 1 of 505. It runs from December 28, 504 to January 3, 505.

    Even and odd weeks

    Week 1 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 1 in other years

    FromTo
    Week 1 in 503January 1, 503January 7, 503
    Week 1 in 504December 31, 503January 6, 504
    Week 1 in 506January 4, 506January 10, 506
    Week 1 in 507January 3, 507January 9, 507

    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 505 began on December 29, 504. 505 has 53 ISO weeks, because 1 January 505 falls on a Thursday.

    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 1 of 505 start and end?

    Week 1 of 505 starts on December 29, 504 and ends on January 4, 505 (ISO 8601, Monday to Sunday).

    Which month is week 1 of 505 in?

    Week 1 of 505 starts in December and ends in January.

    What dates are in week 1 of 505?

    December 29, 504, December 30, 504, December 31, 504, January 1, 505, January 2, 505, January 3, 505, and January 4, 505

    How many weeks does 505 have?

    505 has 53 ISO weeks, because 1 January 505 falls on a Thursday.

    Is week 1 an even or odd week?

    Week 1 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 1 of 505. It runs from December 28, 504 to January 3, 505.