Data sources: 1. Time Zone Database: http://www.iana.org/time-zones 2. A shapefile of the TZ timezones of the world: https://github.com/evansiroky/timezone-boundary-builder/releases How to update: 0. Download and extract shapefile to ".\bin\tz\border\" 1. Run "update.cmd" 2. Go to dir ".\src\TimeZoneDll" 3. Modify "VersionInfo.rc" 4. Run "Build_TZIDx2.cmd" 5. Now you can find updated lib in ".\bin\TimeZone.dll"