On behalf of the co-chairs I announce a colloquium about the implications of possible changes to the definition of UTC which is scheduled for a vote by delegates to the Radiocommunication Assembly in January. The draft under consideration by the ITU-R would redefine the notions of time and calendar day in ways that would have broad side effects. The website for the colloquium is http://futureofutc.org/ Abstracts already received include contributions from national observatories, international agencies, geophysics and navigation communities. Software and operating systems remain underrepresented. I invite contributions from members of the time zone community and anyone who may have code, systems, or products which could be affected by changes in the definition of the radio broadcast time signals which underly them. -- Steve Allen <sla@ucolick.org> WGS-84 (GPS) UCO/Lick Observatory--ISB Natural Sciences II, Room 165 Lat +36.99855 1156 High Street Voice: +1 831 459 3046 Lng -122.06015 Santa Cruz, CA 95064 http://www.ucolick.org/~sla/ Hgt +250 m