I already have a recurring scheduled DND set for my phone for every evening through morning. However, I have calendar events that I would like to automatically trigger DND. For example, let's say I have a meeting with a co-worker, I'd like to be able to enter that into my calendar and select a "DND" option for that time. So, once the event is over, my phone is back to normal, and I don't have to worry about silencing it myself. Is this possible?
This is a feature I find lacking in the current (and previous) versions of iOS. The only step one can take, unless one works on the iOS dev team @ Apple, is to give feedback about the iPhone, and make an enhancement request with this succinct need.
I did this months ago, and more folks who would like this functionality in later versions of iOS should make this request as well.