from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Of, relating to, or used in a calendar.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Of, pertaining to, or used by a calendar system.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. relating to or characteristic of or used in a calendar or time measurement
calendar + -ical (Wiktionary)