How many minutes a week does the daylight get longer?

Answer 1

It is not a linear process but a sinusoidal process. The daylight period increases most rapidly at the Spring equinox. The rate of increase slows to 0 at the Summer solstice, after which it starts decreasing. The rate of decrease reaches a maximum at the Autumn equinox after which it starts easing up. It reaches 0 at the Winter solstice after which it starts increasing until the Spring. Remember, though that Spring in the Northern hemisphere is offset by six months compared to the Southern Hemisphere, and so on. Thus, when daylight hours are increasing in the Northern hemisphere, they are decreasing in the Southern hemisphere. The periodicity of this process is a year.

The rate of maximum increase (or decrease) per week depends on the latitude. In the polar regions, the day length reaches 24 hours during the Summer and cannot increase further. Similarly, during the Winter, daylight length decreases to 0 and cannot decrease further.