search for: pal_timezoneinfo

...time zone conversion. and found in unicode.org's ICU library has a function ucal_getTimeZoneIDForWindowsID which do the time zone convert. Microsoft also use it for time zone convertion in dotnet 6 and 7.(https://github.com/dotnet/runtime/blob/main/src/native/libs/System.Globalization.Native/pal_timeZoneInfo.c) . IMHO, use this function to implement time zone convert on windows is better than R's hand-write conversion implementation, use the ICU , it will update the conversion when unicode org upgrade the ICU library and no more hand-write conversion code needed. Also RTools already included the I...