As we travel our elliptical orbit around the sun, we experience the four seasons. This is because of Earth’s axial tilt. The North Pole always points to Polaris (the North Star), so as we orbit, the noontime sun moves higher or lower in our skies. The day on which it reaches the furthest point north in the Northern Hemisphere is called the Summer Solstice.
When the sun is higher, you experience summer. More photons from the sun reach a smaller area on the ground, so we receive the most heat in the summer. It has nothing to do with how close Earth is to the sun in its orbit. In fact, we are closest in the Northern Hemisphere during our wintertime.
In 2020, the Summer Solstice was June 20. This is traditionally a season of celebration and much romance.
Sadly, the observatory continues to be closed due to the virus.