There is a known problem with the $TZ environment variable. Here's a discussion from 2017: https://cygwin.com/pipermail/cygwin/2017-May/232675.html
The problem is that both Cygwin and Windows use the $TZ environment variable, but they interpret it differently. The Windows handling of $TZ (or %TZ%) is documented here: https://docs.microsoft.com/en-us/cpp/c-runtime-library/reference/tzset?view=msvc-160 For example, Pacific Time is represented as TZ=PST8PDT. In Cygwin, my $TZ is set by default to "America/Los_Angeles". Any Windows applications that I invoke from Cygwin, if they attempt to determine the time zone, will behave inconsistently because they don't see "America/Los_Angeles" as a valid time zone string. I've worked around this by unsetting TZ in my .bash_profile . Cygwin applications are still able to determine the correct time zone. I suggest that Cygwin should *not* set the TZ environment variable. -- Problem reports: https://cygwin.com/problems.html FAQ: https://cygwin.com/faq/ Documentation: https://cygwin.com/docs.html Unsubscribe info: https://cygwin.com/ml/#unsubscribe-simple
