Equal Day/Night Everywhere
Name: Sarah P.
Date: Tuesday, May 21, 2002
At the time of the spring and fall equinoxes, there are
12 hours of daylight and 12 hours of darkness all over the world. The
dates of these are?
This NEVER happens. For example, the poles have one sunrise and one sunset
each year. There is never a 12 hour day, 12 hour night at the poles.
Due to atmospheric refraction, there is never a single date in the rest of
the world for such an occurrence.
Many "standardized" tests make this error, as do texts.
In Chicago, IL 12 hour day/night occurs about 17.March. In Southern
Brazil, this happens about the 23.March.
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Update: June 2012