Is the only option for a good night's sleep to manually put the phone in silent mode?

Question

On Google Voice I have do not disturb hours automatically, so calls at 3am won't ring my phone.
However, I also have people who call my iPhone directly.
I live in Hawaii and I don't need calls coming in at 3am my time, 9am EST.  I can manually put it into silent mode, but last night I forgot, and sure enough the phone blasted away while I was sleeping.
Why can't I say during certain hours don't ring the phone?  This is a smart phone right?

Answer 1

After researching it more today I found at that Apple is falling behind.
With the Android not only can my phone be silenced at 3am automatically, but it will also automatically adjust the ringing and vibration based on my location or at specific times.  For example, if I am in school it knows I am in school and the ringer is shut off automatically, so I don’t get that embarrassing call during a lecture.  Once I leave school I don’t miss calls because the ringer automatically comes back on, I don’t have to remember to change it manually. 
Plus, you can specify certain callers to get through at anytime, for example, my family can still ring my phone at 3am, but no one else.  Daycare can always get through too, even if you are in a meeting you want to know if your child had an emergency.
It can even remind you to charge your battery if it is below a certain percentage and it knows you are now located at home where you can charge it.
I am feeling left out of the technology curve now with the iPhone clunky on / off hardware switch that I have to remember to change manually.