Yes, Jehovah's Witnesses have no objection to festivals as long as they do not display or support unchristian principles. Many participate in music or art and crafts festivals as well as other cultural festivals. They do not celebrate or participate in religious festivals or festivals with pagan origins.
Does any religion?
It is possible to celebrate almost any occasion, such as getting a new job or passing exams or getting baptised, but not the 'traditional' ones such as birthdays, Christmas and Easter etc. Most if not all occasions have some pagan, religious or nationalistic background that Witnesses try and avoid.
Jehovah's Witnesses only have one religious celebration, that of the Lord's evening meal (or last supper). On a personal level they celebrate any joyous occassion that is not connected with false worship. Jehovah's Witnesses thus celebrate marriages, births, graduations and any other number of occassions.
Jehovah's Witnesses do not celebrate holidays that they believe do not fit true Christianity. These include Christmas, Easter, and even birthdays. The Jehovah's Witnesses believe that Christ did not command his birth - or any birth - to be celebrated; he just wanted his death to be remembered.
Yes, Jehovah's Witnesses have no objections to any celebration so long as it does not have pagan or false religious origins.
If your question is related to the child of one of Jehovah's Witnesses it should be noted that Jehovah's Witnesses do not celebrate birthdays and so it is unlikely that the parents of the child will concent to any 'celebrations' in the regard.
Nowhere. Jehovah's Witnesses follow both explicit bible law AND implicit scriptural principle. The selection of holiday parpicipation is principally the latter.
Jehovah's Witnesses do not celebrate any kind of Mass. Mass is a Catholic observance. We are not Catholic. So whether it be Christ - mas; or a Daily Mass; we do not observe them. Please see additional Wiki link below.
Jehovah's Witnesses do not celebrate holidays such as Christmas, Easter, and birthdays because they believe these celebrations have pagan origins and are not supported by the Bible. They focus on commemorating events such as the Memorial of Christ's death instead.
Seventh-Day Adventists do celebrate Christmas. Many seem to confuse them with Jehovah's Witnesses who will not celebrate Christmas or any other holiday because they believe they are Pagan.
Since Jehovah's Witnesses do not celebrate birthdays, you would use the same greeting that you do any other day of the week.
They can if they chose but since Jehovah's Witnesses do not celebrate their birthdays it most would decline. If the luncheon is being given to make the Jehovah's Witness happy it would no doubt be more respectful to take the above into account and chose another moment to arrange a meal.