Complex sentence: On March 23rd 1993, the school was renamed "Johann-Wolfgang-von-Goethe-Gymnasium" and hasn't changed again and the booster club had its first general meeting.
Split into simpler sentences: On March 23rd 1993, the school was renamed "Johann-Wolfgang-von-Goethe-Gymnasium" and hasn't changed again. The same day, the booster club had its first general meeting.