Usa 2024 Summer Starting Date. Here are the equinox and solstice dates—plus, answers to common questions about the seasons of the year in north america. That’s just after father’s day and juneteenth—so we recommend.

When does summer start 2024 and when is the longest day? 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.