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_name_77 (gregorian_calendar VARCHAR, sign_of_zodiac VARCHAR)

### Question ###
WHAT IS THE GREGORIAN CALENDAR FOR AQUARIUS?

### Accurate SQL ###

SELECT gregorian_calendar FROM table_name_77 WHERE sign_of_zodiac = "aquarius"