Originally Posted by Huw
1. Can you go into your calendar settings and make sure you have all the boxes for calendar notifications turned on?
2. That's how all android sound profiles work. If you use the volume keys while music isn't playing, you can change the notification volume. Unfortunately there isn't a way to swap between volume with vibrate and volume without vibrate (the only thing I wish I had).
3. Don't know of any way to do this, other than leaving your phone in silent mode all night. Which it sounds like isn't something you really want to do.