When Is Summer 2024 Date In Usa. The first official day of summer astronomically for 2024 is thursday, june 20, which is when the northern hemisphere has the longest day of the year, according. See the national calendar or choose your state's calendar to view the holidays by month.
Summer 2024 will begin on thursday, june 20, according to the old farmer’s almanac. Find out the dates of all federal and state holidays in the united states for the year 2024.