Ten years ago today, we started logging the #mediawiki channel
July 19, 2007: [05:47:31] <amidaniel> You're now being logged -- http://tools.wikimedia.org/~amidaniel/chanlogs/%23mediawiki/
http://bots.wmflabs.org/~wm-bot/logs/%23mediawiki/20070719.txt
The channel (presumably) existed way before that, but I thought this was a nice anniversary to celebrate.
Here's to another 10 years!
-- Brian