and awards. The peak use of Mason jars came during World War II, when the U.S. government rationed food, encouraging the public to grow their own. As migration to cities occurred, along with the rise of electrical refrigeration, the more efficient transport of goods made fruit and vegetables available year-round, reducing the need for home canning.

On August 15, 2017, the registrar at National Day Calendar proclaimed National Mason Jar Day to be observed