The phrase "post time" refers to the scheduled start time of a horse race or other sporting event. There are various synonyms that can be used to describe this time, depending on the context. In horse racing, "gate time" or "start time" may be used interchangeably with "post time." For other sports, words such as "kickoff time," "start time," or "tip-off time" might be more appropriate. Regardless of the specific wording, the phrase is always used to communicate when an event is set to begin, so that fans and participants can be ready and prepared to enjoy the action.