Dreams of Reason Feast Day is celebrated on April 14 and focuses on unconventional ideas that did not materialize, including outdated scientific theories and unfulfilled science fiction concepts. The day encourages reflection on these imaginative hopes as part of the creative journey, highlighting examples like phrenology and the dream of flying cars. Typical customs include exploring forgotten ideas, hosting movie nights featuring sci-fi films that missed their predictions, and engaging in discussions about past predictions versus reality. Participants may also launch brainstorming sessions for new imaginative proposals and share quirky outcomes on social media using the hashtag #DreamsOfReasonFeastDay. The origins of this feast day are unclear, but it has gained popularity through online holiday calendars and social media, celebrating the exploration of bold yet unproven theories.