CREATE TABLE table_56261 ("Date" TEXT, "Visitor" TEXT, "Score" TEXT, "Home" TEXT, "Leading scorer" TEXT, "Attendance" FLOAT, "Record" TEXT)

What is the date of the game with the Rockets as the visitor team?
SELECT "Date" FROM table_56261 WHERE "Visitor" = 'rockets'
SELECT "Date" FROM "table_56261" WHERE "Visitor" = 'rockets'