I personally have taken flights with weird departure time like this. A lot of flights from San Francisco to Hong Kong has departure time like this, arriving Hon

I personally have taken flights with weird departure time like this. A lot of flights from San Francisco to Hong Kong has departure time like this, arriving Hong Kong at around 7am. I think in general it is just depends on the origin+destination time zone & fight duration, these 2 factors determines the sweet spots of departing, and while there can be a few combinations that works, those few combinations can likely be realized due to various factors. Other examples involved going from Hong Kong to London (which has similar relation comparing to going from SFO to HKG). I personally didn’t try that but first heard people made mistake like this (getting to the flight one day late) in this combination.