CREATE TABLE table_40397 ("Week" FLOAT, "Date" TEXT, "Opponent" TEXT, "Result" TEXT, "Attendance" FLOAT)

What was the Date of the game held during Week 1, that had an Attendance greater than 50,637?
SELECT "Date" FROM table_40397 WHERE "Attendance" > '50,637' AND "Week" = '1'
SELECT "Date" FROM "table_40397" WHERE "Attendance" > '50,637' AND "Week" = '1'