Jw's are not allowed to celebrate any holidays that may have even a hint of 'pagan origins'.
However the organization adopted a practice in 1952 that has 'pagan influence' according to the Watchtower and the reputable source they quote from.
That practice is excommunication. JW's call it 'disfellowshipping'.
Why did the Watchtower adopt a practice that had pagan influences, when at the same time they forbid JW's from celebrating holidays that have a pagan influence?
The Watchtower said this about excommunication in their Jan 8, 1947 AWAKE Magazine:
Excommunicated persons were looked upon with contempt, being cursed and damned by the Devil
Excommunication as a punishment or 'medicinal remedy' finds NO SUPPORT IN THE BIBLE
Excommunication "is altogether foreign to Bible teachings. Hebrews 10:26-31"
Excommunication had a 'pagan influence'
The clergy used excommunication as a 'weapon' to attain power and secular tyranny
JW's might argue that their leaders are imperfect, the organization makes mistakes, and they're continually receiving new light. However the fact remains that disfellowshipping has 'pagan' origins and influences. That was true in 1947 and it will always be true in the future.
In recent years, the WBTS of Jehovah's Witnesses have stepped up the practice of disfellowshipping and shunning in spite of the fact that excommunication has pagan origins.
This article was inspired by videos from the 2016 Convention of Jehovah's Witnesses that require JW's to shun their loved ones, parents, children, brothers, sisters, ... all friends who leave the organization. You will find these videos about the Watchtower's disfellowshipping and shunning practice on YouTube.
God Bless all of you,
Founder of thejehovahswitnesses.org