Back in the 60's, Indiana, where I lived, had a snit about daylight savings time and wouldn't change one year. As a result, there was "state time" and "federal time". Any form of transportation....bus, train, plane...that crossed a state line operated on "federal time". Any transportation between Indiana cities operated on "state time".
Thus, if you were catching a bus that went directly from Indianapolis to Chicago, you left at 3:00 p.m. "federal time". If the bus was going to Fort Wayne, Indiana, it left at 3:00 p.m. "state time". If it stopped at Fort Wayne on the way to Indiana, it left Indianapolis on "state time" and then left Fort Wayne on "federal time."
As you can imagine, it was an absolute disaster.
Another weird time factoid. India operates on a 1/2 hour thingamabob. If it's 12 noon in New York, it's 9:30 p.m. in New Delhi. Who's sitting on the half hour? And where did it go?