Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_16075179_6 (date_of_appointment VARCHAR, team VARCHAR)
### Question:
When was the date of appointment for St. Johnstone's manager? 
### Answer:
SELECT date_of_appointment FROM table_16075179_6 WHERE team = "St. Johnstone"