The "DateTime PPM hunt" recalls the time I tried to get DateTime installed on Windows and had to track down a PPM. I've long since forgotten where I found it. Maybe take a look at these mailing list posts to find some pointers. this one seems promising, assuming you know what to do with a "PPD file" (I don't).
There's also this list of pre-built PPM files which appears to include DateTime and related modules. (Also available for "ActiveState 6xx," whatever that means). The DateTime page at that site has a bunch of PPM-related links at the bottom.