Muggledom Mysterium

"MUGGLEDOM MYSTERIUM: Annual Convention of Wizards & Witches — On the Fourteenth day of the Eleventh Month of this Almighty Year in which we find ourselves."

- Muggledom Mysterium announcement.

Muggledom Mysterium is the name of a wizards' annual convention held every 14 November.

Appearances

 * Harry Potter and the Order of the Phoenix (film)