Here's why:

* Earth's Tilt: The Earth is tilted on its axis, and this tilt is the reason we have seasons. During the Summer Solstice, the Northern Hemisphere is tilted most directly towards the Sun, receiving the most sunlight.

* Sunrise and Sunset: This means that the Northern Hemisphere experiences longer days and shorter nights. The Sun rises earlier and sets later during the Summer Solstice, resulting in the earliest sunrise of the year.

Keep in mind that the specific date of the Summer Solstice varies slightly each year.