Calendar of Events of the 175th Meeting of the American Astronomical Society 9-13 January 1990, Washington, DC

Calendar of Events of the 176th Meeting of the American Astronomical Society 10-14 June 1990, Alburquerque, New Mexico

Calendar of Events of the 177th Meeting of the American Astronomical Society, 13-17 January 1991, Philadelphia, Pennsylvania

Calendar of Events of the 178th Meeting of the American Astronomical Society, 26-30 May 1991, Seattle, Washington

Calendar of Events of the 17th Annual Meeting of the Division of Planetary Sciences, 28 October-1 November 1985, Baltimore, Maryland

Calendar of Events of the 18th Annual Meeting of the Division of Planetary Sciences, 4-7 November 1986, Paris, France

Calendar of Events of the 19th Annual Meeting of the Division for Planetary Sciences, 10-13 November 1987, Pasadena, California

Calendar of Events of the 20th Annual Meeting of the Division for Planetary Sciences, 31 October-3 November 1988, Austin, Texas

Calendar of Events of the Joint Meeting of the American Astronomical Society and the Canadian Astronomical Society, 14-18 June 1987, Vancouver, Canada

Calendar of the Greek Orthodox Church

Calendar Reform

Calendar Reform

Calendar Reform

Calendar Reform

Calendar Reform

Calendar Reform

Calendar Reform and International Peace

Calendar Reform from an Astronomer's Viewpoint

Calendar Reform: Bob McClenon's Calendar

Calendar, A reply to Professor Ginzel on the calendar dates in the Elephantine papyri