AEST stands for Australian Eastern Standard Time. It is always UTC+10.
AEST is standard time. While daylight saving time is in effect, the same areas use AEDT (UTC+11) instead.
Right now Sydney uses AEDT (UTC+11), not AEST.
Where AEST is used
Australia.
In some of these countries AEST is used only in part of the country or only part of the year.