DESCRIPTION This is another implementation of a perpetual calendar. However, dates prior to October 15, 1582 (the Gregorian Reformation) were not taken into consideration, thus, the day of week for them would be incorrectly reported. A return value of 0 means that the day of week is "Sunday". A return value of 1 is "Monday", 2 is "Tuesday", 3 is "Wednesday", 4 is "Thursday", 5 is "Friday", and 6 is "Saturday". See the example directory for usage. REFERENCE "A Mental Calendar" by Michael Keith, Journal of Recreational Mathematics, 1975-1976. LICENSE This program is free software; you can redistribute it or modify it under the terms of the GNU General Public License. AUTHOR Julius C. Duque