Australia/Adelaide. The UTC offset is UTC+9:30 in winter (standard time) and UTC+10:30 during daylight saving time (summer).Australia/Adelaide. Use this string in programming languages and APIs: JavaScript (`new Intl.DateTimeFormat('en-US', { timeZone: 'Australia/Adelaide' })`), Python (`pytz.timezone('Australia/Adelaide')`), or any IANA-compatible library.