Table schema:
CREATE TABLE table_name_87 (date VARCHAR, opponent VARCHAR, result VARCHAR, name VARCHAR)

Question: 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"