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. (AUDIO: The Fires of Vulcan; TV: The Fires of Pompeii)

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)