Final answer:
On or about June 21, the sun rises highest in the sky in mid-latitudes in the Northern Hemisphere. The sun's maximum altitude during the day is greatest on this date. It appears about 23° north of the equator and passes through the zenith of places on Earth that are at 23° N latitude.
Step-by-step explanation:
On or about June 21, which is known as the summer solstice, the sun rises highest in the sky in mid-latitudes in the Northern Hemisphere. At this time, the sun appears about 23° north of the equator and passes through the zenith of places on Earth that are at 23° N latitude. This latitude is called the Tropic of Cancer. The sun's maximum altitude during the day is greatest on this date.