Loading Map.... St. Mark’s Roman Catholic Church1147 Discovery Street - San MarcosEvents 33.1339644 -117.17451340000002 Date/Time Date(s) - 09/07/201512:00 pm - 4:00 pm Location St. Mark's Roman Catholic Church Categories Community Parish Events Summer Labor Day Monday, September 7th and the Annual Labor Day Picnic from Noon to 4 PM. Pot Luck, bring your favorite dish the Knights will do hamburgers, hot dogs and drinks. Join the fun! An afternoon of fun, games and fellowship. Picnic, games and fun on the lawn outside the Saint John Paul II Building.