CREATE TABLE table_22297140_3 (date_of_vacancy VARCHAR, outgoing_manager VARCHAR)

What was the date in which Behtash Fariba left his team?
SELECT date_of_vacancy FROM table_22297140_3 WHERE outgoing_manager = "Behtash Fariba"
SELECT "date_of_vacancy" FROM "table_22297140_3" WHERE "Behtash Fariba" = "outgoing_manager"