This is the 4032nd most frequent Spanish word.
christmas
The Spanish word for "Christmas" is "Navidad," meaning the annual Christian festival celebrating the birth of Jesus Christ.
In this sentence, 'Navidad' is used as a proper noun describing the holiday itself.
La Navidad se celebra el 25 de diciembre.
Christmas is celebrated on December 25th.
Here, 'Navidad' modifies 'adorno', showing that the ornament is specifically for or related to Christmas.
Compré un adorno de Navidad para el árbol.
I bought a Christmas ornament for the tree.
In this sentence, 'Navidad' refers to the festive period around Christmas, within the phrase 'vacaciones de Navidad'.