Is Jesus not ruling already since 1914 (or around that year)? According to WT, He is ruling invisibly. So, there is no need to remember his death as he is alive and is now ruling for his people (again, according to WT). So, again, even according to their own doctrines, they should now partake or have a memorial at all.
Cor. 11:23 For I received from the Lord what I also passed on to you: The Lord Jesus, on the night he was betrayed, took bread, 24and when he had given thanks, he broke it and said, 'This is my body, which is for you; do this in remembrance of me.' 25In the same way, after supper he took the cup, saying, "This cup is the new covenant in my blood; do this, whenever you drink it, in remembrance of me.' 26For whenever you eat this bread and drink this cup, you proclaim the Lord's death until he comes." (1 Corinthians 11:23-26)
But hey, without the WT invented memorial season, what else do they have to feel important?