On 10/9/19 11:52 AM, Eli Zaretskii wrote:
> Do you understand why macOS returns UTC where GMT is expected?

Yes, it's what the low-level gmtime_r function returns in its struct tm. This 
aspect of gmtime_r is not standardized, and some implementations return "GMT", 
some "UTC", and I vaguely recall seeing other abbreviations.

I installed the attached patch, which should fix the problem though I've tested 
it only on GNU/Linux.