23 August

According to the Roman calendar, 23 August was the tenth day before the Calends of September. (AUDIO: The Fires of Vulcan)

In the year 79, the Seventh Doctor and Melanie Bush arrived in Pompeii (AUDIO: The Fires of Vulcan) as did the Tenth Doctor and Donna Noble. The next day, the city's Mount Vesuvius erupted. (TV: The Fires of Pompeii)

The Daleks once stole the Mark One model of a time machine called the Time-Conveyor, which was built by Peter and David's uncle. They hoped to reverse-engineer their own time machine from it. Peter and David pursued them through time in the Mark Two. They finally recovered it in Pompeii during the eruption of Vesuvius, having defeated the Daleks one-by-one along the way. (PROSE: Timechase)

In 1628, George Villiers died. (AUDIO: The Church and the Crown)

In 2001, Cassandra Schofield reportedly went missing. (AUDIO: Project: Destiny) In reality, she was turned into a vampire (AUDIO: Project: Twilight) and was later recruited by the Forge. (AUDIO: Project: Lazarus)