Christmas and Easter are two of the most important Christian holidays. Christmas is celebrated on December 25th and commemorates the birth of Jesus Christ. Easter is celebrated on the first Sunday after the first full moon following the vernal equinox and celebrates the resurrection of Jesus. The crossword solutions for these two holidays are 'island' (6 letters) and 'ORATORIO' (8 letters). An island is a piece of land surrounded by water, and an ORATORIO is a large musical composition for orchestra, choir, and soloists.