Talk:4–4–5 calendar

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Should also mention 13x4 calendar, which has 13 periods of 4 weeks for the year, with the "extra" period usually put into the final quarter or second half. To compare: 4-4-5 calendar has the following annual pattern 4-4-5,4-4-5,4-4-5,4-4-5, whereas 13x4 has 4-4-4,4-4-4,4-4-4,4-4-4-4. Some major european retailers use this calendar type. It has the same need for a 53rd week as 4-4-5, usually added to the extra period 13 but sometimes managed as a 14th period of 1 week. —Preceding unsigned comment added by 78.105.60.169 (talk) 22:31, 11 May 2011 (UTC)

week 53 in ISO

  • 28. Desember 1998 - 3. January 1999 is week 53 of 1998
  • 27. Desember 2004 - 2. January 2005 is week 53 of 2004
  • 28. Desember 2009 - 3. January 2010 is week 53 of 2009
  • 28. Desember 2015 - 3. January 2016 is week 53 of 2015
  • 28. Desember 2020 - 3. January 2021 is week 53 of 2020
157.157.92.142 (talk) 10:27, 17 February 2012 (UTC)