get_zodiac_sign
Western sun sign from a date of birth (year optional, ignored). Returns sign slug, name_en, name_hi, start, end, element, modality, ruler, is_cusp (first or last day), cusp_neighbour, convention 'standard calendar dates', url. Validation error for impossible dates like 02-30. Example input: {"month":7,"day":23,"lang":"en"}
day必填langmonth必填