CREATE TABLE table_54018 ("Date" TEXT, "Visitor" TEXT, "Score" TEXT, "Home" TEXT, "Leading scorer" TEXT, "Record" TEXT)

What was the date of the game in which the home team was the Grizzlies and the visiting team was the Timberwolves?
SELECT "Date" FROM table_54018 WHERE "Home" = 'grizzlies' AND "Visitor" = 'timberwolves'
SELECT "Date" FROM "table_54018" WHERE "Home" = 'grizzlies' AND "Visitor" = 'timberwolves'