It shall be unlawful for any solicitor, salesman, or peddler to solicit any individual between the hours of six (6:00) o’clock P.M., and eight (8:00) o’clock A.M., unless they have a previous appointment with the resident, or residents, of the premise solicited. It shall be unlawful at any hour for a solicitor, salesman, or peddler to solicit without a proper license on his person at all times. (Ref. 17-134 RS Neb.)