Perl: how to install the DateTime module for times

Question

I am using Perl for the first time, and I need to use the DateTime class to parse timestamps, compare timestamps, etc. However, I found that it is not included with Perl (I am using Strawberry 5.26.1.1) and needs to be separately downloaded and installed. After spending some time googling, I am still not sure where to download and how to install. I tried the following but it does not work. I have already set the http_proxy, http_proxy_user and http_proxy_pass variables.

PPM interactive shell (11.11_03) - type 'help' for available commands.
PPM> install DateTime
Install package 'DateTime?' (y/N): y
Installing package 'DateTime'...
Error installing package 'DateTime': Could not locate a PPD file for package DateTime
PPM>

Thanks.