How to check when a page was modified?
 

I tried Tools>Page Info in Firefox, but it only lists my time. How can I find out when a particular web page was modified (html page...not dynamic)?

Check out www.archive.org

Actually, I did check that out. I just didn't know if that was their archive dates or actual dates of modification on the publication server... For my purposes, that's probably all I need, but I'm curious if this is an accurate time of the latest update.

If it's a static page (.html or the like), you can do this:

$ telnet thedomain.com 80
Trying 66.254.110.97...
Connected to thedomain.com.
Escape character is '^]'.
HEAD /page.html HTTP/1.1
Host: thedomain.com

HTTP/1.1 200 OK
Date: Tue, 17 Jan 2006 03:49:16 GMT
Server: Apache/1.3.29 (Unix) PHP/4.3.10
Last-Modified: Tue, 04 May 2004 13:33:00 GMT
ETag: "610135-20c-40979b8c"
Accept-Ranges: bytes
Content-Length: 524
Content-Type: text/plain

Connection closed by foreign host.

I just checked and it's the same one as in "Modified" in FireFox's Page Info. If there's nothing or shows current time/date, the server didn't send a Last-Modified header.

OK...thanks. The wayback machine's date will work for my purposes, since there's no last-modified header.