Lawrence Sidney (L.S.) Day was born on Novemer 11, 1931 in Rochester, New York. He studied at the Rochester Institute of Technology before moving to New York City, where he studied at the Art Students League. At some point he went to San Miguel Allende in Mexico where he furthered his art studies at the Instituto Allende. Day then moved up to California where he spent the rest of his life, living and working in Ojai, Camarillo and Oak View.

Lawrence Sidney Day died on August 19, 2019 in Oak View, CA.