CREATE TABLE table_47863 ("Date" CLOB, "Time" CLOB, "Opponent" CLOB, "Site" CLOB, "City" CLOB)

What date was the game held at UMBC Field?
SELECT "Date" FROM table_47863 WHERE "Site" = 'umbc field'
SELECT "Date" FROM "table_47863" WHERE "Site" = 'umbc field'