Hi all,

I know this might sound like a broken record to some, but could we please remove ambiguous time zone abreviations for Australia? I can't for the life of me understand why anyone would want to keep the Australian zones as EST/EST and CST/CST rather than EST/EDT and CST/CDT or AEST/AEDT and ACST/ACDT.

Stating that there are conflicting messages from state and federal government regarding the use of time zones in Australia is misleading. No State or federal government proposes the use of EST/EST and CST/CST as the correct usage of time zone abbreviations. Whilst there is some inconsistency in the usage of AEDT/EDT/EDST within those sites when they explicitly state which time zone should be used it is AEST/AEDT and ACST/ACDT.

Finally, the arguments around the usage of Eastern/Central Summer Time (EST/CST) being the status Quo amongst Australians based off the survey conducted in the following linked is flawed:
 
http://mm.icann.org/pipermail/tz/2012-October/018364.html 

searching for EDT or EST by themselves will return a number of things that have no relation to time zones. Similarly, "Eastern Summer Time" and "Eastern Daylight Time" do not necessarily relate to the usage of a particular abbreviation.

Searching for the number of hits for the following strings gives a better understanding of the usage of the relevant time zone acronyms in Australia:

Google results for au domain:

45,100: "Eastern Standard Time (EST)"
82,400: "Eastern Standard Time (AEST)"

34,900: "Eastern Summer Time (EST)"
117: "Eastern Summer Time (AEST)"
72,100: "Eastern Daylight Time (EDT)"
218,000: "Eastern Daylight Time (AEDT)"

387,000: "Central Standard Time (CST)"
8,030: "Central Standard Time (ACST)"

3: "Central Summer Time (CST)"
3: "Central Summer Time (ACST)"
22,300: "Central Daylight Time (CDT)"
1,460: "Central Daylight Time (ACDT)"

Here we are only looking at cases where the time zone abbreviation has been defined. These results show that the abbreviation for Daylight time EDT/AEDT/CDT/ACDT is overwhelmingly greater than the usage of the abbreviation for Summer time EST/AEST/CST/ACST. Furthermore, varients of the search for "Eastern Daylight Saving/s Time (A/EDT)" give another ~3,000 hits and variants of "Eastern Daylight Saving/s Time (A/EDST)" only give ~ 500 results.