CREATE TABLE table_76710 ("Week" FLOAT, "Date" TEXT, "Opponent" TEXT, "Score" TEXT, "Result" TEXT, "Attendance" TEXT, "Record" TEXT)

What was the date of the game with an attendance of 20,874 fans?
SELECT "Date" FROM table_76710 WHERE "Attendance" = '20,874'
SELECT "Date" FROM "table_76710" WHERE "Attendance" = '20,874'