When Is Summer 2024 In Usa Calendar. When is summer break 2024? Online calendar of holidays and days off in united states for the summer of 2024.

Summer 2024 starts on thursday, june 20th in the northern hemisphere, with the first day of summer being the longest daylight day of the year with the earth’s axis having reached its furthest tilt and begins to change directiion back. It is the longest day of the year that marks the.