def lunar_date() 
      l = convert(@date.year, @date.month, @date.day)
      l[0].to_s + "-" + l[1].to_s + "-" + (/^\d+/.match(l[2].to_s)).to_s
    end
def lunar_date() 
      l = convert(@date.year, @date.month, @date.day)
      l[0].to_s + "-" + l[1].to_s + "-" + (/^\d+/.match(l[2].to_s)).to_s
    end
Get the Lundar date in 'xxxx-xx-xx' fromat