America/Anchorage. The UTC offset is UTC-9 in winter (standard time) and UTC-8 during daylight saving time (summer).America/Anchorage. Use this string in programming languages and APIs: JavaScript (`new Intl.DateTimeFormat('en-US', { timeZone: 'America/Anchorage' })`), Python (`pytz.timezone('America/Anchorage')`), or any IANA-compatible library.