August 24- a.d. IX Kal. September (ante diem ix kalendas septembres)
Mt. Vesuvius Erupts
On A.D. 79 1 p.m. Mount Vesuvius erupted pouring ash onto the surrounding area including Pompeii and Herculaneum.
Lunae in Graecostasi
The Graecostasis was a platform between the Comitium and the Forum. Sacrifices were made there to Luna, the Roman moon goddess (like the Greek Selene).
Mundus a ritual pit with a cover that was removed three times a year: Aug 24, Oct 5, and November 8. Lid was regarded as the gate of hell (ostium Orci). Spirits (manes) could emerge to roam the city.
Festival to Vulcan
The Volcanalia continued.