CREATE TABLE table_name_87 (date VARCHAR(255), opponent VARCHAR(255), result VARCHAR(255), name VARCHAR(255))
What is the date of the match with a result of ud 12/12 between Pernell Whitaker and James Mcgirt?
    
SQL: SELECT date FROM table_name_87 WHERE result = "ud 12/12" AND name = "pernell whitaker" AND opponent = "james mcgirt"