"Summer: the season between spring and autumn comprising in the northern hemisphere usually the months of June, July, and August or as reckoned astronomically extending from the June solstice to the September equinox Etymology: Middle English sumer, from Old English sumor; akin to Old High German & Old Norse sumer summer, Sanskrit sama year, season
Date: before 12th century" www.merriam-webster.com

"Rest is not idleness, and to lie sometimes on the grass on a summer day listening to the murmur of water, or watching the clouds float across the sky, is hardly a waste of time." John Lubbock