A resort visited for holidays/vacations during the summer.

summer fallow

The summer of 1967, noted for its love-ins and the flourishing of the hippie movement.

A stretch of sunny and warm, often hazy, days during late autumn. / (figuratively) The late autumn of life; a late flowering of activity before old age.

(Britain) daylight saving time

(astronomy) The moment when the Earth is in that point of its orbit where the northern or southern hemisphere is most inclined toward the sun.

Any of various academic sessions held in the summer at schools or universities when the usual students are away; either for supplementary or remedial study or as part of distance learning.

(uranography) A bright asterism of the northern summer sky. Its corners are the three 1st-magnitude stars Altair (α Aql), Deneb (α Cyg), and Vega (α Lyr).

Satureja hortensis

Piranga rubra, a medium-sized American songbird.