Spring is the season for festivals in Louisiana, and March and April kick off with several festivals worth catching: the Louisiana Black Heritage Festival (March 10-11); the Amite Oyster Day Festival (March 16-18); St. Patrick's Day parades and celebrations on March 17 (lots of green beer and cabbage-throwing in the Irish Channel neighborhood and the French Quarter); St. Joseph's Day Festivities with parades on March 17 and 18, and a St. Joseph's altar at the Piazza D'ltalia (an orgy of food ...