[msandin]

The answer to the question "when did some work happen" is an instant and I specifically said that instants should be stored in UTC. I'm talking about storing recurrent schedules, i.e. information about when an (potentially infinite) series of future events should take place. And that information is not a series of instants and can't be stored as UTC timestamps because it's potentially infinite, subject to future reconfiguration, subject to future timezone offset changes, and must be preserved in a format that allows it to be viewed and edited (Thursdays odd weeks at 10:00 is not easy to glean from a series of pre-calculated numbers).