Full name is Eastern Standard Time
AEST – Australian Eastern Standard Time (Alternative - often used in international context to avoid confusion with CST/Central Standard Time in Northern America)
Email time zone indicator: +1000
An email sent from someone in the EST time zone will have the time zone listed as "+1000" in the headers of the email. (However, "+1000" does not have to be in EST, as other time zones could have the same UTC offset).
For actual dates DST might be observed, look at the examples below
Where and when is EST observed?
EST is used during winter in these Australian territories (Eastern Daylight Time during summer)
Australian Capital Territory
New South Wales - except Yancowinna County (CST/CDT)
Tasmania
Victoria
EST is used all year
Queensland
Time zone maps are under development and will be available later