Crossword clues for the word: UNDAY The word UNDAY has appeared as an answer to at least 9 crossword clues on different crossword puzzles. Crossword clues for UNDAY Showing 1 to 9 of 9 results Clue(s) "Oct. 24, 1947 declaration" "Oct. 24, every year" 10/24 celebration of global cooperation 10/24 observance Annual Oct. 24th observance International observance in 20-Down, informally It's observed on Oct. 24 Oct. 24 Oct. 24th observance