I suppose you can use the Scheduler to make anything run on time. I don't see any reason to include timed events in the playlist. Playlist is a list of tracks that are about to play, Scheduler lists events that run on time.
This is called Sweepers, desktop RadioBOSS has this feature, and RadioBOSS Cloud will also have it soon:
https://manual.djsoft.net/radioboss/en/sweepers.htm