According to < ?
day=27&month=8&year=2007&hour=20&min=0&sec=0&p1=0&p2=16> 20:00 UTC
works out to 22:00 for my timezone (CEST), but when I clicked the
puppet.ics file an event appeared at 16:00 that day in my iCal.
Anyone else having problems with that?

Nils Breunese.

Nope, I imported it into my google apps calendar and it converted from 20UTC to 4pm EST just like it should.