Help with a batch action?

Looked into trying to do a little something to save me a lot of manual tag editing time, but seems a bit hard for me to grasp... I have 130 files like this:

2015-12-15-SHOW-NAME-MISC.mp3

What I am trying to do is either get that day of the week (15) and ADD it to the end of the title which is basically:

Show Name 2015-12-

Or if I have to start from scratch with the title, just completely pull the whole first 10 chars of the file name and put it after custom text (Show Name).

But this scripting stuff is way over my head. Can someone help me out with the string/expression I need to accomplish this?

Nevermind, I got it