user: Question: On what day was the team playing at Milwaukee County Stadium?
Columns: ['Week', 'Date', 'Opponent', 'Result', 'Game site', 'Record', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'real']
Sample row: [1.0, 'September 3, 1978', 'San Diego Chargers', 'L 20-24', 'Kingdome', '0-1', 55778.0]
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Game site" = 'Milwaukee County Stadium';