Unsolicited feedback: It would be nice to also have the ability to filter by time the "old way" (ie ignoring the date). I'm pretty date agnostic and often just want to find a cheap flight over a 1-2 week period while being able to filter out early AM departures, which seem to often make up the bulk of the cheapest flights.

I do find the current method of date/time filtering useful as well though in other circumstances!