Why Do Days Get Shorter or Longer?

Answer

Days get longer or shorter due to the different seasons at different times of the year. These different seasons are as a result of the earth's position and its tilting with reference to the sun. When the North Pole is inclined away from the sun, the Northern Hemisphere experiences the winter season that is characterised by shorter days and when it is inclined towards the sun, the summer season is experienced resulting in longer days.
Q&A Related to "Why Do Days Get Shorter or Longer"
I think you are referring to the Annual cycle of the seasons. This occurs due to the orientation of the axis of the Earth's rotation with respect to the ecliptic, the plane in which
http://wiki.answers.com/Q/Why_do_the_days_get_long...
It is not true that all commercials get shorter when
http://www.chacha.com/question/why-do-commercials-...
The earth's axis is tilted with respect to the plane of the earth's orbit around the sun. In the summer time, the north pole is tilted slightly towards the sun. From our perspective
http://www.webanswers.com/science/why-do-the-days-...
Your question has a tiny little flaw in it. You stated nothing at all about sunset times. So to assume that the change in daylength, is based solely on rise times, is a bit lacking.
http://answers.yahoo.com/question/index?qid=200910...
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