International Dalek Remembrance Day, also known as Dalek Day, is observed worldwide every December 21. This holiday celebrates the Daleks, a fictional alien race from the Doctor Who series, created by screenwriter Terry Nation and designed by Raymond Cusick. The Daleks, originally a humanoid race called the Kaleds, have transformed into merciless cyborgs with a singular goal of universal conquest and extermination of perceived inferior races. The day marks the anniversary of their first appearance in the Doctor Who serial "The Daleks" in 1963. Fans typically celebrate by rewatching episodes featuring the Daleks, hosting Dalek-themed parties, and exchanging related merchandise like action figures and T-shirts. The holiday has gained recognition, receiving the official blessing of the BBC, which has engaged with fans through social media on this occasion.