I use the incredibly useful feature on OS X to announce time on the hour for my time management by checking the option in Date & Time preferences.
However, the time announcements keep going on during the night unless I shutdown my iMac (which I don't want to). Is there a way to silence it during night time or to make it not announce time when the screen is locked?
I know there was a related question for OS X Lion but posting this to see if there is a better/different solution for El Capitan.