What is the term used for the shout made by stage management when the show will start in fifteen minutes?

The term used for the shout made by stage management when the show is about to start in fifteen minutes is "quarter." This call is part of the series of notifications that keep the cast and crew informed about the time remaining before the performance begins. The "quarter" call indicates that there are 15 minutes remaining until the show's start, allowing time for any final preparations.

In theatre, the specific terms used for these time calls often have historical significance and establish a clear, consistent communication system within the production team. Other calls such as "half" refer to 30 minutes remaining, "five" indicates five minutes before the show starts, and "now" signifies it's time for the performance to begin. Each of these calls plays a critical role in the smooth operation of a performance, ensuring that everyone is on the same page regarding the timing of events leading up to the show.