Which month in 2013 did the U.S. use the ruby birthstone?
CREATE TABLE table_name_76 (
    month VARCHAR,
    us__2013_ VARCHAR
)
SELECT month FROM table_name_76 WHERE us__2013_ = "ruby"
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: Which month in 2013 did the U.S. use the ruby birthstone? ### Input: CREATE TABLE table_name_76 (
    month VARCHAR,
    us__2013_ VARCHAR
) ### Response: SELECT month FROM table_name_76 WHERE us__2013_ = "ruby"