Ascension Thursday by Diocese of Des Moines | May 18, 2022 The celebration of Ascension Thursday has been transferrred to Sunday in the Diocese of Des Moines. We have followed this practice for many years. Diocese of Des Moines The Diocese of Des Moines, created in 1911, serves people over a 12,446 square mile area in the southwestern quadrant of Iowa, including 23 counties. Previous Blog Next Blog