English Wikipedia - The Free Encycl...
Download this dictionary
Perpetual calendar
A
perpetual calendar
is a
calendar
valid for many years, usually designed to allow the calculation of the
day of the week
for a given date in the future.
See more at Wikipedia.org...
© This article uses material from
Wikipedia
®
and is licensed under the
GNU Free Documentation License
and under the
Creative Commons Attribution-ShareAlike License