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_name_79 (week VARCHAR, date VARCHAR)
### Question:
What was the week number when they played on Dec. 19?
### Answer:
SELECT COUNT(week) FROM table_name_79 WHERE date = "dec. 19"