- Time zone names based on geography, without slashes, e.g.
"Singapore".
- Time zone names that contain explicit DST rules. Syntax: see
- <http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap08.html#tag_08_03>
+ <https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap08.html#tag_08_03>
The Microsoft CRT understands only the first kind. It produces incorrect
results if the value of TZ is of the other kinds.
But in a Cygwin environment, /etc/profile.d/tzset.sh sets TZ to a value