[ekiru]

The problem isn't that multiple time zones give the same local time at a particular time; the problem is that a person may experience the same local time multiple times during a day due to traveling or summer time.

Suppose I'm coming back to Chicago from a trip to Japan, and a friend wants to get an early dinner when I get back. One frequent direct flight from Tokyo leaves NRT around 6 PM and arrives at ORD at 4 PM on the same calendar date. Before I leave Chicago I set an event for meeting them at our favorite restaurant at 5:30 PM. Should my calendar remind me about the event when it's 5:00 PM where I'm at waiting for my flight to board at Narita or at 5:00 PM where I'm at back in Chicago?