National Hammock Day is celebrated every year on July 22 to commemorate the universal symbol for relaxation. Developed by the Mayans of Central and South America for sleeping or resting, a hammock is a sling made of fabric, rope or netting, which is suspended between two points such as posts or trees. Most often, hammocks were made from the woven bark from the Hamack Tree — hence “hamacas”. Today the hammock is often seen as a symbol of summer, leisure, relaxation, and simple, easy living. So grab your favorite book, put your feet up, and relax!