Please do this! DND doesn't work on numbers not in the contact lists, i.e companies/bills.

I would like set a silent hour (At work) for not having SMS ringtones but keep call ringtones.

I need this because I have people who seem to think it's ok to text people any time of day or night. I don't want to silence my phone completely either, just text.

This definitely needs to be a thing. Samsung Galaxies did this up until Lollipop and it was so nice to have it automatically mute the sound. You could also select certain contacts who would still be able to call you as normal (such as my parents or husband at 3am if there is some sort of emergency - I would want my phone to ring for that, but not for a drunk and bored friend who is pocket dialing me).