How does the tilt of Earth's axis affect the length of the days?

The speed at which the earth is rotating determines the day's duration. Axial tilt determines daylight duration at any point on earth. The daylight is longer when the pole is tilted towards the sun than when it is pointing away.

Explanation:

the secretary of state, appointed by the president with the advice and consent of the senate, is the president's chief foreign affairs adviser. the secretary carries out the president's foreign policies through the state department and the foreign service of the united states.