Thank you all for the responses!
This doesn't help at all since iPhone will be vibrating anyway. To turn off vibrations will be totally way around since you have only 2 options with the switch on the left side, TURN ON and OFF.
@snappyfool - Thanks! That's a good idea. However it would be nice if I could do it quicker
@SuperSnake2012 - I would have to do that everyday, 3-5 times switching this option back and forth. Plus, I won't see I got a text or I wouldn't be informed with iCal alarm.
@Sweeperdk - I have no idea what this option does... There is no way to set it up but the schedule. This option is useless.
@maxosx - BIG LOL! hahaha. So funny.
I will go with DND option for now. I don't want vibrations because it pisses off people in a library. But I don't want to go back and forth to the settings to switch it.
I should write it more clearly, but my main problem is vibrations, which I want to have on, but now while studying.
If you know about any app for that problem, I would appreciate.
Thanks