Leading scientists around the world are meeting in Britain to consider a proposal that could eventually see Greenwich Mean Time relegated to a footnote in history...
That would see atomic time slowly diverge from GMT, by about one minute every 60 to 90 years, or by an hour every 600 years, and there would need to be "leap minutes" a couple of times a century to bring the two in line.
http://www.abc.net.au/news/2011-11-0...istory/3617226