ca·len·dri·cal /kəˈlɛndrɪkəl, kæ-/
  Ca·len·dric Ca·len·dric·al a., Of or pertaining to a calendar.
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  calendrical
       adj : relating to or characteristic of or used in a calendar or
             time measurement; "calendric systems"; "solstice is a
             time of calendric importance" [syn: calendric]