Why YSK: If you live in the US and you have a phone you need to keep secret for any reason, make sure that it is turned off at this time.
DO NOT TURN IT ON AGAIN UNTIL YOU ARE ALONE AND SAFE BECAUSE THE ALARM WILL COME THROUGH AS SOON AS THAT PHONE IS POWERED ON.
Also, this is directed toward people in abusive relationships. If you have a secret phone because you're cheating, you suck.