The two days of the year on which neither hemisphere is tilted toward or away from the sun are called

These two days are called summer solstice and winter solstice.

Sequoia national park  /  inyo national forest, california, u.s. mount whitney is the tallest mountain in california, as well as the highest summit in the contiguous united states and thesierra nevada—with an elevation of 14,505 feet (4,421 m).