Don't Bother Me Until...!

Sometimes we are in situations in which we need to silence our cell phones (meetings, study hours, cinema, ...). However, sometimes we forget to turn on the sound again when the situation has timed out. It would be useful to automate this task knowing the time we should have our cell phone silenced.

Don't Bother Me Until...! has been conceived for this task. We just have to choose between the two operational modes (until a specified time or during a specified time) and turn on the program. It will manage to get the sound back to our cell phone at the right time.