This page provides a way for you to obtain
a table of the duration of daylight or darkness for any year between 1700 and 2100.
You can obtain a table for any location worldwide
by following these simple steps:
Decide on which form to use. If you want a table for cities or towns in the
U.S. or its territories,
use Form A below.
For other locations,
use Form B below.
Enter the year (1700 - 2100) for which the table is desired.
Select the table type (daylight or darkness) from the pop-up
list in the form that you are using.
Specify the location of interest using the fields provided on the form.
Click the "Compute Table" button at the end of the form to compute the
table. The table will provide the data requested in hours:minutes format.
Be sure to read Notes
section (on this page beyond the two forms) for an
explanation of the items in the table.