Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_22640051_3 (date_of_vacancy VARCHAR, outgoing_manager VARCHAR)

### Question ###
Name the date of vacancy for manuel pellegrini

### Accurate SQL ###

SELECT date_of_vacancy FROM table_22640051_3 WHERE outgoing_manager = "Manuel Pellegrini"