Summer 2024 Date North America Calendar. 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. United states 2024 holiday calendar with all major holidays and observances.

United states 2024 holiday calendar with all major holidays and observances. Here’s a list of the exact dates and times of the four seasons in north america, including the first days of winter, spring, summer, and fall for the next few years.