What Is The Longest Night Of 2024. The winter solstice, also known as the hibernal solstice, occurs when either of. Learn more about the astronomy behind the solstice with royal observatory greenwich.

How can the december solstice have the longest night in the northern hemisphere but neither the earliest sunset nor the latest sunrise? The winter solstice on december 21, 2024, marks the shortest day and longest night of the year for the northern hemisphere.