In a desperate avoidance of doing anything substantial or worthwhile, I've spent the whole day submitting every gig I've ever been onto Last.Fm. Some observations:

1. I have way too much time on my hands.
2. May is always the best month for gigs.
3. Last.Fm's event search function was apparently constructed by a malevolent God who feeds upon the pain and frustration of its users.

Anyway, the full list can be found here:
http://www.last.fm/user/citizenmeh/events