The present-day calendar below the clock was added in 1870.

The Orloj suffered heavy damage on May 7 and especially May 8, 1945, during the Prague Uprising, when Germans directed fire from armored vehicles and an anti-aircraft gun, their goal to silence the provocative broadcasting initiated by the National Committee on May 5.

The hall and nearby buildings burned along with the wooden sculptures on the Orloj and the calendar dial face made by Josef Mánes. The machinery was repaired, the wooden Apostles restored by Vojtěch Sucharda, and the Orloj started working again in 1948, but only after significant effort.