San Francisco Opera's Virtual Ring Festival, featuring the 2018 Runnicles/Zambello production: the entire month of March, with panel discussions and lectures as well as the operas on the weekends, featuring:
Die Walküre: March 13-14;
Siegfried: March 20-21;
Götterdämmerung: March 27-28
Free streaming, from 10:00 am Saturday through –11:50 pm Sunday (Pacific Time).
You may purchase $15 tickets for individual events.
Click here for details on Ring Festival and Streaming FAQs.