summertimeEtymologyFrom Middle English somertime, equivalent to summer + time. Compare Dutch zomertijd (“summertime”), German Sommerzeit (“summertime”), Danish sommertiden (“summertime”), Swedish sommartid (“summertime”). Compare summertide.summertime means The period or season of summer. Lexicurio rates it Rare gem — a strength score of 74 out of 100.nounThe period or season of summer.