Phrase “Merry Christmas - a neologism” by Aldaleon

Does anyone know what this would be in Sindarin?

I myself might render it as:

No veren bo i·Aur Rhistonnad. Be joyous on the day of Christmas.

or

Glass allen bo Thristonnad. Joy to you on Christmas.

But those are just thoughts I had. Others may have some other ideas as well.

Annon allen! Thank you for the help! It would be fun to write this on Christmas cards this year.