Package COM.INFORMATIMAGO.COMMON-LISP.CESARUM.JULIAN-CALENDAR


Defines the Julian calendar.


See also: COM.INFORMATIMAGO.COMMON-LISP.CESARUM.DATE
          COM.INFORMATIMAGO.COMMON-LISP.CESARUM.DATE.UTILITY
          COM.INFORMATIMAGO.COMMON-LISP.CESARUM.GREGORIAN-CALENDAR

License:

    AGPL3
    
    Copyright Pascal J. Bourguignon 2007 - 2012
    
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU Affero General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
    
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU Affero General Public License for more details.
    
    You should have received a copy of the GNU Affero General Public License
    along with this program.
    If not, see <http://www.gnu.org/licenses/>

(leap-year-p year)
function
RETURN: Whether YEAR is a julian leap year.
NOTE:   We don't implement here the actual leap years (they started with
        a leap year every three years, since they used to count both the
        start and end items...).