Yes, I think they are talking about the last supper. The Jews will celebrate with a lamb and other stuff, as gentile believers we simply celebrate with bread and wine and do it often in remembrance of our Lord, Savior and King - Yeshua/Jesus Christ.
Eat and remember me now.
We can't repeat a last supper for centuries and it be a last supper. And communion was what they were doing there too. Not for always.
If Jesus is inside the believer and guiding their life, how do you forget him?