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  • From 4 PM UTC on the day before the 1st Sunday of April until 4 PM UTC on the day before the 1st Sunday of October, Sydney is three hours ahead of Vietnam.
  • From 4 PM UTC on the day before the 1st Sunday of October until 4 PM UTC on the day before the 1st Sunday of April, Sydney is four hours ahead of Vietnam.
  • ICT (Vietnam always) = UTC+7
  • AEST (Sydney Apr-Oct) = UTC+10
  • AEDT (Sydney Oct-Apr) = UTC+11

7 PM ICT = 10 PM AEST = 11 PM AEDT

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9y ago
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11y ago

When Australia is on Standard Time, Viet Nam (UTC+7) is 3 hours behind Sydney (UTC+10/UTC+11).

When Australia is on Summer Time, Viet Nam is 4 hoursbehind Sydney.

In Australia, Summer Time begins on the 1st Sunday of October and ends on the 1st Sunday of April.

So when it's 7 PM ICT in Viet Nam, the time in Sydney is either 10 PM Eastern Standard Time or 11 PM Eastern Summer Time.

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Q: What is the time difference between Vietnam and Sydney?
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