There have been a number of Threads touching on this before, Leolaia for one, back in the day when we had many an erudite Poster, showed the pagan origins of many things, including the Passover , and by extension, the JW " Memorial".
What prompted my thought on this was a conversation I had the other day with a young lady, never a JW, who said the JW stance on birthday celebrations, was groundless and cruel.
I thought later that JW's do a " Pick and Mix " as usual, as they do with so many other things, on what they condemn as "pagan" and what they accept and practice.
The institution of Marriage itself is pagan, marriages were performed long before the Bible was written, and long before the Nation of Israel was formed. Yet JW's perform marriages, use the veil, and the ring, all Pagan. The names of the days of the Week, the months of the year, all Pagan.
I guess you guys can think of many more things ? JW Hypocrisy at full bore again.