Hi, Here is a .NET library that I think should be linked to at the main page http://www.twinsun.com/tz/tz-link.htm The link: http://www.babiej.demon.nl/Tz4Net/main.htm This is how they defined themselves: C# /.NET implementation of timezone class based on Olson database (often called tz or zoneinfo). As opposite to Win32/.NET API, it allows to perform conversion of arbitrary time between arbitrary time zones. Regards Michael Kariv