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JWs don't celebrate.
They would make horrid Hebrews of old. All the Israelite festivals would be bastions of depression, focused on death.
Passover would be a wailing for slaughtered baby sheep instead of joy for said lambs blood saving people from death. Oh, and no one would celebrate the day because someone came along a thousand years later and named it Easter.
The Day of Atonement would mean a call from Bethel to PETA to stop one goat from dying for a nations sins. And one other goat from wandering over a cliff in the Grand Canyon. JWs don't like goats.
Festival of Booths, nope ...campout fun.
The Celebration of Pentacost ... well, NO celebrations! You get no fun. Besides, that's a thanks for the Mosaic Law fun time.
Abraham, Israelites, Jesus, the Apostles; they celebrated. They'd throw a huge feast (a party) just because a child was weaned. A culture which loves to dance, sing, joke, and celebrate. David was basically naked dancing and singing in the streets. Lol Its not the Lord's Evening Meal, its the friggin Passover Celebration.
These things would get you labeled unspiritual in the JW world.
Now to actually celebrate Christ's death, feeling joy at what his sacrifice did for everyone, talking about the kewl things he did and said? Being thankful that Jesus CHOSE to die for mankind, when he could have chosen otherwise? He had a choice, just as Satan and the others gone rogue had a choice. Unheard of, preposterous! He gets a mention at the end of a prayer, that's it.
JWS don't celebrate. They're Jonah and followers of Paul.