Question

Is it possible to let google search return the last modified date/time for each webpage by adding something to the url parameter after www.google.com/search?q=...? Or, is there a simple way to get such information?

Additional question: Why does google not include such information in the search results? It is very essential information, and does not seem to require additional job provided that google crawls thourgh each page.

Answer 1

Or, is there a simple way to get such information?

Try netcat (or telnet, any other simple networking tool).

Command:

$ nc stackoverflow.com 80
HEAD / HTTP/1.1
Host: stackoverflow.com

Response:

HTTP/1.1 200 OK
[...]
Last-Modified: Sat, 07 Jan 2012 14:01:34 GMT