The Aeropaus was an institution in ancient Greece responsible for the regulation and management of religious and ceremonial affairs related to the weather. The word 'aero' in Greek means air, while 'paus' means to stop. Therefore, the term 'aeropaus' can be translated as 'the stopping of the air'. The Aeropaus would oversee the traditional festivals, or 'sacrifices', held in honor of the gods that were associated with the different seasons and cycles of nature. These festivals include the Anthesteria, Dionysia, and Haloa. During these festivals, the Aeropaus would perform various rituals and offerings to appease the gods and ensure good weather for the prosperity of the people. The Aeropaus is also known for creating the Greek calendar, which was a lunar-based system that consisted of twelve months with a thirteenth month added occasionally to correct the mismatch between the calendar and the solar year.