This article is within the scope of WikiProject Time, a collaborative effort to improve the coverage of Time on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.
The Wikipedia 1.0 Editorial team identified the following articles relating to Time as Vital: "for which Wikipedia should have a corresponding high-quality article, and ideally a featured article." Those marked with this icon: are also considered to be Core articles, "one of the core set of articles every encyclopedia should have."
Their quality-scale rating as of September 2010 is listed alongside each:
This article is within the scope of WikiProject Business, a collaborative effort to improve the coverage of business articles on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.
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 220.127.116.11 (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