Every year, November 21 is World Hello Day. The objective is to say hello to ten people on the day. By greeting others, the message is for world leaders to use communication rather than force to settle conflicts. The event began in 1973 by Brian and Michael McCormack in response to the Yom Kippur War.
Since then World Hello Day has been observed by people in 180 countries. It has garnered accolades from people around the globe including politicians, religious leaders, and celebrities. It was also made reference to in the 8th Episode of the First Season of Pushing Daisies in the Episode "Bittersweets" in a conversation between Ned and Chuck. (From: Wikipedia)