Looking at the CPAN Testers Matrix, the tests on Windows started failing in 1.02, although the tzset call was introduced in 1.01. However, the changes between 1.01 and 1.02 are so minimal (just one patch) that unless that bug is affecting you, you could just as well install 1.01, or comment out the offending tzset line. But I'd definitely also file an issue with the maintainer, since this is clearly a regression on Windows.