Membership is renewed at the beginning of each calendar year by a payment slip which comes by post.
To become a member send an E-mail to the secretary. Austria is one of the countries with the richest heritage of sundials in the world. The 144-page catalogue, containing 33 photographs of sundials and 7 illustrations, is format 16,5 x 23,7 cm. It is only available in German. Since 1990, GSA has organised an annual meeting in autumn, usually in September.