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_55 (date_of_delivery VARCHAR, baby_gender VARCHAR, congresswoman VARCHAR)

### Question ###
What was the delivery date of Congresswoman Kirsten Gillibrand's baby boy?

### Accurate SQL ###

SELECT date_of_delivery FROM table_name_55 WHERE baby_gender = "boy" AND congresswoman = "kirsten gillibrand"