Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_16 ( date VARCHAR, week VARCHAR, opponent VARCHAR )

### Question ###
Can you tell me the Date that has the Week smaller than 13, and the Opponent of green bay packers?

### Accurate SQL ###

SELECT date FROM table_name_16 WHERE week < 13 AND opponent = "green bay packers"