Mapping an offset to a datetime timezone

[Hill, Ronald]

Hi All,

I have recently updated the test scripts for the
Astro::Sunrise module and would like to incorporate these
changes into the DateTime::Event::Sunrise test suite. However,
I am unable to map an offset into a datetime timezone. Is
there a way to take an offset say -8 hours and look this up
and know that this is America/Los_Angeles timezone?

Thanks

Ron Hill