First Day Of Summer 2024 Calendar Date Usa. — united states 2024 holiday calendar with all major holidays and observances. Summer 2024, fall 2024, spring 2025.
— 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. When is the first day of summer 2024?