Synonyms and antonyms of Greetings for specific occasions in American Thesaurus

happy birthday ()

a greeting you use when it is someone’s birthday

Happy Birthday/Easter/Anniversary ()

used as a greeting on a particular occasion

many happy returns ()

used as a greeting that you say or write to someone on their birthday

Merry Christmas ()

used for wishing someone a happy time at Christmas

season’s greetings ()

used as a greeting during the Christmas period, especially on cards