It shouldn’t be too hard using Rama’s Get Current Operating System Time blueprint node.
A digital clock would be fairly simple, but an analogue like in your case will need some more work to get the clock arms in place but since from what I see the BP gives you the seconds/minutes and hours as different variables it shouldn’t be too hard to make. I don’t have access to UE4 at the moment but when I have I will try to do it.