Final answer:
The summer solstice in the Northern Hemisphere occurs on June 21, which marks the longest day of the year, with the Sun directly overhead at the Tropic of Cancer.
Step-by-step explanation:
The summer solstice in the Northern Hemisphere occurs on June 21. This is the date when the North Pole is tilted towards the Sun, resulting in the longest day and shortest night of the year for this hemisphere.
The Sun is at the zenith for observers on the Tropic of Cancer, meaning it appears directly overhead at noon for those at approximately 23° N latitude. The significance of the summer solstice has been recognized in many cultures, often celebrated as midsummer day.
After June 21, the points of sunrise and sunset migrate southward again, and the days gradually become shorter as the Earth continues its orbit around the Sun.