Tell a Lie Day on April 4 is an unofficial holiday dedicated to lying. Read more
Walk to Work Day on first Friday of April encourages people to ditch the cars and bikes and walk to work in an effort to reduce pollution and to stay healthy. Read more
1 4月Fun at Work Day encourages people to have some fun at work.
3 4月World Party Day on April 3 is an unofficial holiday that encourages people to initiate social change by partying.
5 4月Read a Road Map Day on April 5 encourages people to pick up an actual paper map and read it.
5 4月April 5 is First Contact Day. It is a holiday celebrated by fans of the TV series, Star Trek.