And it gets even worse for flights between northern and southern hemispheres where schedules need to refelect what may be a two-hour time difference as one side of the equator moves forward and the other side backward. And when the changeover date is not the same, boy do things get confusing for a few weeks!
In April I flew from Australia to the US over the Sunday that the US changed, so I was in the air at the nominated change time. When looking at the schedule, the same flight number had different departure/arrival times for consecutive days leaving Saturday, Sunday and Monday. I flew on the Sunday.
Of course this was even further complicated since my home port (BNE) does not observe daylight saving, so my BNE-SYD flight was also affected as SYD moved off daylight saving at 2am Sunday morning, and LAX moved into daylight saving 16 hours later, partway through my 13 hour flight.
And then there is the matter of dealing with our Australian metric time verses the US time. The sooner the world moves to metric time the better. 100 seconds in a minute, 100 mins in an hour, and 10 hours in a half-day. Time conversion without an international watch/clock can get very confusing

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[This message has been edited by NM (edited 10-13-2002).]