CREATE TABLE table_49751 ("Months in Malayalam Era" TEXT, "In Malayalam" TEXT, "Gregorian Calendar" TEXT, "Tamil calendar" TEXT, "Saka era" TEXT, "Sign of Zodiac" TEXT)

WHAT IS THE GREGORIAN CALENDAR FOR AQUARIUS?
SELECT "Gregorian Calendar" FROM table_49751 WHERE "Sign of Zodiac" = 'aquarius'
SELECT "Gregorian Calendar" FROM "table_49751" WHERE "Sign of Zodiac" = 'aquarius'