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_76 (month VARCHAR, us__2013_ VARCHAR)
### Question:
Which month in 2013 did the U.S. use the ruby birthstone?
### Answer:
SELECT month FROM table_name_76 WHERE us__2013_ = "ruby"