CREATE TABLE table_50078 ("Date" TEXT, "Visitor" TEXT, "Score" TEXT, "Home" TEXT, "Record" TEXT, "Points" FLOAT)

What is the date of the game with pittsburgh as the home team and boston as the visitor team?
SELECT "Date" FROM table_50078 WHERE "Home" = 'pittsburgh' AND "Visitor" = 'boston'
SELECT "Date" FROM "table_50078" WHERE "Home" = 'pittsburgh' AND "Visitor" = 'boston'