John Jacob Jingleheimer Schmidt

Q:

Andy Pigeon and Dingo Payne are two of my favorite fictional characters. They are arch rivals and have been since childhood ..... yet there is something they have always shared and always will.  When you discover what that is, rearrange the letters to find when they will next meet.

A:

The title is an old children's song and the second line is, "His name is my name too."

Andy Pigeon and Dingo Payne are indeed anagrams of each other (and perhaps will appear in someone's upcoming novel).

The picture is a shadow of the lights in a ballpark.

Rearrange the letters in either name to get -

Opening Day