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It depends on the time of year, since Sydney observes Daylight Saving Time (DST) but Hawaii does not.

From 16:00 UTC on the day before the first Sunday of April until 16:00 UTC on the day before the first Sunday of October, Sydney (UTC+10/UTC+11) is 20 hours ahead of Hawaii (UTC-10). During the rest of the year, the time difference is 21 hours.

2 AM HAST (in Hawaii) =
10 PM AEST (in Sydney Apr-Oct) =
11 PM AEDT (in Sydney Oct-Apr)

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7y ago

What else can I help you with?