Description:
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In PHP, formatting a date with 'T' for an Australian East or Central time zone generates "EST" and "CST" respectively. Since time zone calculations often involve global context, it is confusing to have multiple definitions of EST and CST, as EST is also used for Eastern Standard Time (US) and CST for Central Standard Time (US).

To quote Wikipedia:

"The proper names of Australia's time zones vary. In international contexts they are often called Australian Western Standard Time (AWST), Australian Central Standard Time (ACST), and Australian Eastern Standard Time (AEST). In domestic contexts the leading "Australian" is often dropped."