What Is The Longest Day Of 2024. The longest day of 2024 fell on june 21, when the summer solstice occurred. In whitehorse, canada, which is far north, the longest day in 2024 will be 19 hours and 09 minutes.
In 2024, the summer solstice will occur at 4:50 p.m. The summer solstice, also known as the june solstice arrives june 20 at 4:51 p.m.