Another belief is that April Fool's Day originated from the vernal equinox, when the first days of spring began in the Northern Hemisphere, when Mother Nature tricked people with changing and unpredictable weather. In Britain people would celebrate the holiday over two days, where they played simple pranks on people such as pinning "kick me" signs on peoples' backs.
Many people as well as companies participate in this holiday worldwide. Many countries have their own ways to celebrate a holdiay which brings out the kid in all of us.