From Longman Dictionary of Contemporary EnglishHappy Birthday/New Year/Christmas etcHappy Birthday/New Year/Christmas etcPRAISEused to wish someone happiness on a special occasionHappy Birthday, Michael!Happy Thanksgiving, everyone! →happy
Examples from the Corpus
Happy Birthday/New Year/Christmas etc• After midnightneighbours go outside and wish everyone a Happy New Year.• But bookings still rose 41 % from the $ 3. 41 billion posted a year earlier. Happy New Year.• Let's hope that a wetspring will bring greenshoots for Roberts and the economyalike. Happy New Year.• That is what Britain needs as we move into what we all want, a really Happy New Year.• A Happy New Year to you.