CREATE TABLE table_76780 ("Week" FLOAT, "Date" CLOB, "Opponent" CLOB, "Result" CLOB, "Stadium" CLOB, "Record" CLOB, "Attendance" FLOAT)

WHEN has a Opponent of miami dolphins?
SELECT "Date" FROM table_76780 WHERE "Opponent" = 'miami dolphins'
SELECT "Date" FROM "table_76780" WHERE "Opponent" = 'miami dolphins'