CREATE TABLE table_19499 ("Week" FLOAT, "Date" CLOB, "Opponent" CLOB, "Final score" CLOB, "Team record" CLOB, "Game site" CLOB, "Attendance" FLOAT)

What day were the Denver Broncos the opponent?
SELECT "Date" FROM table_19499 WHERE "Opponent" = 'Denver Broncos'
SELECT "Date" FROM "table_19499" WHERE "Opponent" = 'Denver Broncos'