Crossword clues for the word: LAMMAS The word LAMMAS has appeared as an answer to at least 6 crossword clues on different crossword puzzles. Crossword clues for LAMMAS Showing 1 to 6 of 6 results Clue(s) Aug. 1 fete August 1 as a feast day Feast of St. Peter's Chains Old festival of Aug. 1 Pagan festival of Celtic origin also called Lughnasadh that occurs in August Priests outside mark old feast day