The best thing about Android Lollipop 5.1- it comes with a "priority change setting"! Android Lollipop 5.1 is up with "interruption" preferences module according to which, you can set reminders, alarms, events, messages, calls, and other settings as per your choice. The idea to avoid late night interruptions and to have a customized "downtime" setting is beautifully systemized by this version. For instance, a user can set a downtime until 7 in the morning or for a limited period of two hours; the priority mode can also be "indefinite" in nature.