Inspired by the following message in README.md, I actually created a full implementation of cctz::TimeZoneIf by using Windows time APIs (actually their source data stored in the Windows registry).

They will also work on Windows if you install the zoneinfo files. We are interested, though, in an implementation of the cctz::TimeZoneIf interface that calls the Windows time APIs instead. Please contact us if you're interested in contributing.

Here is my draft pull request.

• Implement TimeZoneIf with Windows Registry #327

If the team is still interested in such an implementation, I'm planning to split the above PR into 2 or 3 smaller ones.