[tz] Windows 8.1 and tz data?

In the email announcement titled " 2014a release of tz code and data available", there is this statement: Microsoft Windows 8.1 and later support tz database names. I did not see this mentioned on the tz list and an hour's googling brings me no joy. Does anyone have any links that will ease my confusion? Thanks -- Donald [|] Joel Cairo: "You always have a very smooth explanation." Sam Spade: "What do you want me to do? Learn to stutter?" - The Maltese Falcon