The amount of movement of the sun along your horizon at sunrise and sunset varies with the time of year as well as your latitude. Furthermore, the daily shift in position of the sun along the horizon is higher the farther north or south you are from the Earth's equator. All these factors combine to produce differences in both distance and direction between sunrise and sunset. In general, the closer you are to the equator, the more dramatic the change in day and night lengths will be during the course of a year. For example, at the North Pole, the sun is below the horizon for three-fourths of the year, while at the South Pole it stays up for two-thirds of the year. At the Equator, the sun rises due east and sets due west. So if you started out walking west toward the ocean, by the time the sun got high in the sky you would have walked far enough that you would be facing east instead (unless, of course, it was cloudy). The farther from the Equator you go, the more north or south you will be, which changes how much daylight and darkness there is each day. In the Northern Hemisphere, where it is light most of the time, people usually refer to this as the "morning" sun and the "evening" sun.