During which season does the length of day increase?

The length of day increases during spring due to the tilt of the Earth's axis and its orbit around the Sun. As spring approaches, the Northern Hemisphere begins to tilt more directly towards the Sun. This results in longer daylight hours as the daylight period increases each day. The increase in sunlight contributes to warming temperatures and the rejuvenation of plant life, which is characteristic of springtime.

Conversely, winter experiences the shortest days as the Northern Hemisphere is tilted away from the Sun, leading to the least amount of daylight. In fall, the days begin to shorten as the Northern Hemisphere starts tilting away from the Sun again, leading towards winter. Summer has the longest days, but the length of day does not increase during that season; rather, it reaches its peak and then begins to decrease as autumn approaches.