I celebrated my own "occasion" on 22nd January... the 73rd anniversary of my birth.
Coincidentally, I learned from Wikipedia that, in latter years, the subject of this puzzle was an inhabitant of the town in which I have lived for the past 22 years... I had no idea!
This is the first Listener I've managed to complete since the "Monopoly" puzzle — some time last year? — but, on this occasion, without recourse to this forum for help!
Radial 12 was my LOI... Tricky definition, Phidias!
(I do like a — what I like to call — Dartboard grid!)