I was about to produce a time zone converter but, while browsing Addons for Firefox I came across something called Foxclocks. This sits in the status bar and will display your time zone along with any number of the worlds time zones. (Limited to the length of the status bar). It is possible to float them. The selection menu is primarily country or, city based but, alongside each is the timezone nemonic ie, CEST, GMT etc. Quite nifty in that you can set any of the clocks to display a colour during a given time period. Ray.