def convert_to_ad(bs_date):
date_components = decompose_date(bs_date)
year, month, day = date_components
validate_date_bs(year, month, day)
ad_year, ad_month, ad_day = _bs_to_ad(year, month, day)
return "{}-{}-{}".format(ad_year, ad_month, ad_day)
def convert_to_bs(ad_date):
date_components = decompose_date(ad_date)
year, month, day = date_components
validate_date_ad(year, month, day)
bs_year, bs_month, bs_day = _ad_to_bs(year, month, day)
return "{}-{}-{}".format(bs_year, bs_month, bs_day)
