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_90 (december VARCHAR, opponent VARCHAR)
### Question:
How many Decembers have calgary flames as the opponent?
### Answer:
SELECT COUNT(december) FROM table_name_90 WHERE opponent = "calgary flames"