Summer Month 2025. This online date calculator will help you calculate how many days are left until any holiday. Whether it’s a relaxing beach break you’re after or an active holiday filled with thrills and spills, we’ve got a summer.
The table below will allow you to view the summer start and end dates for the years 2024, 2025 and 2026. Summer 2025 starts on friday, 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.