This interface is available for compatibility only and will disappear in a future software release; it is impossible to reliably map timezone's arguments to a time zone abbreviation. See
ctime(3); see
tzset(3) for the new definition of this interface.
The
timezone() function returns a pointer to a time zone abbreviation for the specified
zone and
dst values.
Zone is the number of minutes west of GMT and
dst is non-zero if daylight savings time is in effect.