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_1740431_3 ( gregorian_months VARCHAR, season_in_tamil VARCHAR )

### Question ###
What is every Gregorian month when the season in Tamil is ?

### Accurate SQL ###

SELECT gregorian_months FROM table_1740431_3 WHERE season_in_tamil = "இளவேனில்"