OK, am very confused:
Honeymoons and wedding rings, based in paganism, ok for a JW to do.
Windchimes, once prohibited due to the intent to ward off evil spirits, ok for a JW to have.
Pinatas, once prohibited due to origin, now since folks do not associate the fun with a pinata, ok for a JW to do.
Wedding anniversaries, not sure if they are formally addressed in the bible, ok for a jw to do.
Birthdays, two bad examples in the bible plus some stories how originally celebrated by the wealthy (choose to ignore Job 1 - Job 3 when a persons special day is celebrated), not ok for a jw to do (have not been at a birthday party ever where someone was beheaded)
Thanksgiving, actually a basis in the old testament for a celebration of the harvest, not ok for jws to do
You need to either rely on past practice and precedence or ignore it completely, but the WTS seems to speak out of both sides of its collective GB mouth.......