http://www.vulture.com/2013/05/tori-spelling-on-90210-donna-martin-graduates.html?mid=facebook_vulture

This weekend, the Beverly Hills, 90210 episode that brought you "Donna Martin graduates," the show's most iconic line, turns twenty. To celebrate, we spoke to Tori Spelling herself. Here's what she remembers about the season-three ep — in which Donna's classmates fight for her right to graduate even though she got drunk at prom — including her first reaction to the script, the anxiety she felt before shooting it, and why she and the gang had no idea they were making television history.

http://www.huffingtonpost.com/2013/05/22/saved-by-the-bell-cast-where-are-they-now_n_3315962.html

Yesterday (May 22) was the 20th anniversary of Bayside High's graduation (http://www.youtube.com/watch?v=mbaUbt7bnIo). Three days earlier, on May 19, 1993 (http://www.tvrage.com/Beverly_Hills_90210/episodes/20708), West Beverly High held its graduation, with Andrea Zuckerman (http://www.youtube.com/watch?v=qFXrLxFv2Wo) giving the commencement speech.
Read more at http://www.hitfix.com/tv-tattle#MrqpTEicGBLT1k6y.99