Common Lisp Package: COM.INFORMATIMAGO.COMMON-LISP.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.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/>

README:

FUNCTION

Public

LEAP-YEAR-P (YEAR)

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...).

CONSTANT

Private

+DAYS-IN-FOURCENTURY+

Number of days in 400 years. In the Julian calendar, the four-year cycle repeats indefinitely.

Undocumented

+DAYS-IN-FOURYEARS+