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_29273115_1 (original_air_date VARCHAR, written_by VARCHAR)
### Question:
On how many different dates was the episode written by Charlie Day aired for the first time?
### Answer:
SELECT COUNT(original_air_date) FROM table_29273115_1 WHERE written_by = "Charlie Day"