Hi, Jack -
The 500th anniversary celebration started in October, 2016, and there have been lots of events. Some were musical' but probably not enough to keep this thread in the music section very long.
I went hiking in Zermatt with a few Swiss Lutherans who were hoping that Pope Francis would take part in the celebrations. Sure enough, he did:

http://www.npr.org/sections/thetwo-way/2016/10/31/500057532/in-show-of-unity-pope-francis-marks-500th-anniversary-of-protestant-reformation

While in some ways the Reformation was an act of separation, the anniversary has been a celebration of unity and diversity.
Here's a calendar of many of the events that took place over the last year:

https://www.visit-luther.com/explore-luthercountry/events/2017-500th-anniversary-of-the-reformation/

-Joe-