Re: bug#20314: [PATCH] Make output of mdate-sh deterministic

On 09/22/2017 02:57 AM, Bruno Haible wrote:
> Gnulib also supports MSVC, which interprets the TZ environment variable in its
> own way [1][2]. From this doc and from POSIX [3], it looks to me that
>    UTC0
>    GMT0
>    GMT+0
>    GMT-0
> would all be equivalent and portable. Can you confirm this?

All of them would use UTC (the first one with the abbreviation "UTC", 
the others with "GMT"). Other variants would work as well, e.g., 
"UTC-00:00:00". I usually use "UTC0" as it's simplest and most 
technically correct (GMT stopped being standardized many years ago).