Compatible with iOS 7, 8 and 9
Do not get disturbed while in meetings or classes - this tweak adds the option to automatically enter Do Not Disturb mode when a calendar event starts, and to automatically exit DnD when the event ends. You can enable this for each calendar event separately; recurring events are also supported.
It is possible to set the default value (DnD on or off) for new events in Settings/MeetingDnD, as well as to choose if a scheduled DnD should end during a DnD-enabled calendar event.
With MeetingDnD, you can also use Calendar to create a completely custom Do Not Disturb schedule, instead of the simple one available in Settings/Do Not Disturb.
See larger Screenshots below..