Gnulib module: tzset
Portability problems fixed by Gnulib:
TZhas been set by Cygwin.
Portability problems not fixed by Gnulib:
TZenvironment variable, consisting of a time zone abbreviation containing exactly three ASCII letters with no daylight saving time or angle brackets, and with no support for
tzdatabase settings like
TZ='America/New_York'. Even this subset does not work on applications built via the Universal Windows Platform, as it does not make environment variables like
TZavailable to applications.
TZvalues, as this feature was added in IEEE Std 1003.1-2001.