CREATE TABLE table_39070 ("Week" FLOAT, "Date" CLOB, "Opponent" CLOB, "Result" CLOB, "Game site" CLOB, "Record" CLOB, "Attendance" CLOB)

On what date was the game at Lincoln Financial Field?
SELECT "Date" FROM table_39070 WHERE "Game site" = 'lincoln financial field'
SELECT "Date" FROM "table_39070" WHERE "Game site" = 'lincoln financial field'