I used to think that there was a conference season and that it took place in the summer. Now in the Perl world we have so many grass-root events taking place that the whole year is our conference season.
So far this year we have already had "Perl Oasis":http://perloasis.org/opw2009/ in Orlando, "Frozen Perl":http://www.frozen-perl.org/mpw2009/ in Minneapolis, the "Bulgarian Perl Workshop":http://event.perlbulgaria.org/sofia2009/, the "German Perl Workshop":http://www.perl-workshop.de/en/2009/index.html, and the "Belgian Perl Workshop":http://conferences.mongueurs.net/bpw2009/.
Today the "Dutch Perl Workshop":http://www.perlworkshop.nl/nlpw2009/index.html is taking place in Arnhem and tomorrow the "Ukrainian Perl Workshop":http://event.perlukraine.org/upw2009/, "Perl Mova" takes place in Kiev.
Towards the end of the month the "Birmingham Perl Mongers":http://birmingham.pm.org/ are hosting a 3-day "QA Hackathon":http://qa-hackathon.org/. This is a follow-up to the successful QA Hackathon that took place in Oslo last year. This isn't a conference, in the traditional sense, but a place for people involved in QA, testing, packaging, and CPAN to get together and code together.
All this in just three months. It's going to be a fantastic year for Perl conferences.