When Does Summer Start 2024. When is the first day of summer 2024. Of the $12.2 billion americans spent in 2023, at least $4.1 billion was spent on costumes, $3.9 billion on decorations, $3.6 billion on candy and $500 million on greeting.

March 19, 2024 (vernal equinox) summer: Meteorological summer will always begin on 1 june;