designated time for a race to begin.
The time the first race of a performance begins, or any other race on the program.
The start time of the race.
The scheduled starting time.
Scheduled starting time of an event.
The time of day when a race is scheduled to begin.
The time at which all horses are required to be at the post and ready to start.
Designated time for a race to start
The starting time for each race.
The Schedule starting time.
The time the horses are expected to reach the starting "post"; when a race begins.