What timezones are standard for advertising scheduled events in Brazil and Australia?

In Europe we always use CET (e.g. NQR final @ 21CET!) and for North America it seems that EST is used most.

But what are the abbreviations for Brazil and Australia?

NZT

(i wish!)

although we have 4 different timezones in Brazil, we use Brasília's time (official). GMT -3 :-)

What's the standard abbreviation bw, i.e. the equivalent of "CET"?

Should be Eastern Standard Time or something. (EST, newbs)

no abbreviation used actually (as far as i know)

CET is (GMT - 6:00) ?

CET is GMT+1
Central European Time