> 1. If you're recording an event in the past, store it in UTC. Although it is unlikely for a timezone change to be issued after its begin date, it is likely f

> 1. If you're recording an event in the past, store it in UTC. Although it is unlikely for a timezone change to be issued after its begin date, it is likely for a timezone change to be entered into a database after its begin date. If you preserve the original local time you can always convert to UTC accurately.