April Fool's

AnApril Fool's Day is an annual event inevery year on April 1, and is celebrated by practical jokes or humorous content (such as the US, which couldposts under this tag). The event can be thought of as "Notice Your Surprise" day. 

See also

Applied to AI Safety via Luck by Arun Jose 8mo ago
Applied to An Average Dialogue by Nicholas Kross 8mo ago