The Rebbe clarifies that weekday practices for a yahrzeit falling on Shabbat should be done on Friday, citing Acharonim over Gesher HaChaim. He expresses joy that the recipient participates in Chabad gatherings and emphasizes that inspiration must lead to action in thought, speech, and deed.
https://www.torahrecordings.com/rebbe/igroskodesh/014/005/5094