Antarctica/DumontDUrville. The UTC offset is always UTC+10 — this timezone does not observe daylight saving time.Antarctica/DumontDUrville. Use this string in programming languages and APIs: JavaScript (`new Intl.DateTimeFormat('en-US', { timeZone: 'Antarctica/DumontDUrville' })`), Python (`pytz.timezone('Antarctica/DumontDUrville')`), or any IANA-compatible library.