timezone_to_country

Extension method for translation Time Zone Id to ISO 3166-1 alpha-2 code (e.g. 'Asia/Seoul' to 'KR')

Usage

TimeZoneToCountry.getCountryCode('Asia/Seoul')          // 'KR'
TimeZoneToCountry.getCountryCode('America/Los_Angeles') // 'US'
TimeZoneToCountry.getCountryCode('Europe/London')       // 'GB'

String code = await TimeZoneToCountry.getLocalCountryCode();
print(code);  // 'KR'

Source of Time Zone

https://github.com/eggert/tz/blob/master/zone.tab