Get certificate expiry date.

I'm looking for a command-line tool or script that'll provide a
Certificate expiry date if I pass it the URL.
Eg. c:\>certexpiry https://www.example.com
returns ==> 09:00:00 20/8/2008
This is the date advertised in IE as the 'valid to' date seen if you
view the certificate details when browsing to a secure page.
Any help/leads greatly appreciated.