*By Matt Follett* It's the time of year for Advent Calendars and it looks like the Perl community isn't disappointing this year. [Perl Advent Calendar](http://perladvent.pm.org/2009/) > The first day talks about using Package::Alias to alias Mouse to Moose. [RJBS Advent Calendar](http://advent.rjbs.manxome.org/) > Ricardo Signes' calendar to showcase things he has been working on. His first entry is about Sub::Exporter which looks very powerful. [Catalyst Advent Calendar](http://www.catalystframework.org/calendar/2009) [Perl 6 Advent Calendar](http://perl6advent.wordpress.com/) > This one starts off with setting up Rakudo, so it requires very little prior knowledge. [SysAdvent](http://sysadvent.blogspot.com/) > Tips for system administrators All of these have RSS feeds, so they'll be easy to follow. Have fun! *[Matt Follett](http://search.cpan.org/~mfollett/) is a developer in the Informatics team at The Genome Center at Washington University School of Medicine, where he works on high-throughput DNA sequencing projects. He is a graduate of the University of Missouri at Rolla, where he majored in Computer Science & Computer Engineering. He has worked for Monsanto, Boeing, and Beck Automation as a software engineer. He was the head of the 2009 St. Louis BarCamp. He currently resides in St. Louis, where he heads the local chapter of Perl Mongers.*