Pluto Demoted Day is observed annually on August 24 to commemorate the reclassification of Pluto from a full-sized planet to a dwarf planet. This day serves as a reminder of Pluto's historical significance in our solar system, particularly following its demotion by the International Astronomical Union. Celebrations often include educational activities such as science projects about Pluto, watching documentaries related to space, and listening to themed playlists featuring songs like "Pluto" by Bjork. Participants may also host gatherings with space-themed decorations and snacks shaped like planets or stars. The day highlights the ongoing fascination with outer space and encourages exploration of the mysteries of our solar system. It is recognized in countries like Australia, Canada, the United Kingdom, and the United States.