When do kids go back to school in 2025? Most U.S. students now return in early to mid‑August, weeks ahead of the old post‑Labor Day tradition.

For those tuned in to the astronomical calendar, summer doesn't start until a few weeks later. The astronomical season starts June 20, according to the Old Farmer's Almanac.

Climate scientists often identify June 1 as the first day of the meteorological summer. For those tuned in to the astronomical calendar, summer doesn't start until a few weeks later.