How many minutes of daylight are gained per day in Wisconsin after December 21?
The amount of daylight gained between December 21 and December
22 is measured in seconds. By the first week in January, it may be
as much as a minute. From February 1 to February 2, 2 minutes, and
by March 21, 4 minutes per day. Then it begins to decrease until
June 21, when the difference goes back to zero.