CREATE TABLE table_name_77 (date VARCHAR, opponent VARCHAR, record VARCHAR)

What was the date of the game with the Kansas City Royals when the Blue Jays record was 18-12?
SELECT date FROM table_name_77 WHERE opponent = "royals" AND record = "18-12"
SELECT "date" FROM "table_name_77" WHERE "18-12" = "record" AND "opponent" = "royals"