A period of time that can be applied to another time resulting in an earlier range of time.

The departure date and optionally a time period that can be applied before and/or after the departure date.

When true the requested period may extend over the previous or following day. When false, the search period is restricted to the date specified. Normally used when the window duration is in hours.

A period of time that can be applied to another time resulting in a later range of time.