[tz] Tzdb and the Sunshine Protection Act

[Ian Abbott]

On 2023-03-02 23:49, Paul Eggert via tz wrote:
> On 3/2/23 15:32, Paul Gilmartin via tz wrote:
>>
>> The forms containing numbers are mandated by POSIX:
> 
> POSIX does not specify TZ strings like TZ='EST5EDT'; they are TZDB 
> extensions. If you want a TZ string whose meaning is specified, you need 
> something like TZ='EST5EDT,M3.2.0,M11.1.0'.

Weren't TZ strings like "EST5EDT" in use by Unix before POSIX made them 
non-standard?

-- 
-=( Ian Abbott <abbotti at mev.co.uk> || MEV Ltd. is a company  )=-
-=( registered in England & Wales.  Regd. number: 02862268.  )=-
-=( Regd. addr.: S11 & 12 Building 67, Europa Business Park, )=-
-=( Bird Hall Lane, STOCKPORT, SK3 0XA, UK. || www.mev.co.uk )=-