gettz provides a possible fallback in situations where
Sys.timezone() fails to determine the system timezone. That happened when e.g. the file
/etc/localtime somehow is not a link into the corresponding file with zoneinfo data in, say,
/usr/share/zoneinfo. Since the package was written (in the fall of 2016), R added a similar extended heuristic approach itself.
This release adds registration of the compiled routine via
NAMESPACE, and uses an unquoted symbol in
.Call(). Two new badges were added to the
README.md as well. And as in the previous release in 2016: No new code, or new features.