Google Calendar(Android) edit event - what is UI pattern?

I created mobile app for android(with Xamarin Forms). Now I do not like the look of it, I want to update it. I like the look of the app Google Calendar. It is true material design(I read a lot about it). I like how to add and edit events in calendar. For example this:

The edit button, the data ratio and the picture above - are excellent. I want to do the same. What is the name of this pattern? I read a lot about material design but I did not find article about this solution(pattern).

How it's called? What can I read guide(about this pattern edit)?