Hebrew calendar
Rabbi Shimon Sidon was a Hungarian rabbi; born at Nadash on January 3, 1815 ("13 Shevat 5575" on the Hebrew calendar) to Yehuda Sidon from Kunitz and Eidel Sonnenfeld. He died at Trnava on December 18, 1891 ("19 Kislev 5652" on the Hebrew calendar).