• 2012.12.01 in #71 Advent Calendars Calendar
  Len Jaffe created an Advent Calendar pulling together the links to the Advent postings on the various other calendars. Mostly Perl though there are some others as well.
• 2014.12.01 in #175 Advent Planet 2014
  Len Jaffe maintains and Advent calendar collecting the links to other advent calendars.
• 2016.12.01 in #280 Advent Planet
  As every year Len put together the list of all the Advent calendars.
• 2016.12.01 in #281 Advent Planet
  The Avent Plannet where you can find links to the articles of all the articles published in the Advent calendars. 8 of those seem to be Perl-related.
• 2017.12.01 in #333 Advent Planet 2017
  The collection of all the Advent calendars.
• 2017.12.01 in #334 Advent Planet 2017
  The collection of all the Advent calendars.
• 2019.12 in #436 Advent Planet
  The aggregation of other Advent Calendars
• 2020.12.01 in #489 Advent Planet
  Every year Len collects the Advent calendars from around the world and creates an Advent calendar of all of them.
• 2022.12.01 in #593 Advent Planet in 2022
  
• 2023.12.01 in #645 Advent Planet
  If you are looking for Advent calendars about Perl or other languages, check out the Advent Calendar that Len Jaffe has been maintaining since 2000.

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