Crossword clues for the word: UNBIRTHDAY The word UNBIRTHDAY has appeared as an answer to at least 2 crossword clues on different crossword puzzles. Crossword clues for UNBIRTHDAY Showing 1 to 2 of 2 results Clue(s) "Event celebrated in ""Through the Looking-Glass""" "Occasion" celebrated 364 times a year in Carroll's "Through the Looking Glass"