As seen from the north pole--no sun is visible on Jan. 1. On April 1,
it bisects the horizon all day, swinging completely around. April 1 to
July 1, it continues swinging around, gradually rising in the sky, the
spiral converging to its center at the zenith, which it reaches July
1. From July 1 to October 1 the spiral starts again, spreading out
from the center until on October 1 it bisects the horizon again. On
October 1 night arrives to stay until April 1.
At the equator, the sun is visible bisecting the southern horizon for
all 26 hours of the day on January 1. From January 1 to April 1, the
sun starts to dip below the horizon at night, to rise higher above it
during the day. During all this time it rises and sets at the same
hours, but rises in the southeast and sets in the southwest. At noon
it is higher each day in the southern sky until April 1, when it rises
due east, passes through the zenith and sets due west. From April 1 to
July 1, its noon position drops down to the north, until on July 1, it
is visible all day, bisected by the northern horizon.