Time calculations interest many pythonians. "Time Patterns" <URL:http://jerry.cs.uiuc.edu/~plop/plop98/final_submissions/P04.pdf> is a paper I think you'll want to see. -- Cameron Laird http://starbase.neosoft.com/~claird/home.html claird at NeoSoft.com +1 281 996 8546 FAX