Test: Last-Modified • If-Modified-Since • Not-Modified

This page sends a "Last-Modified: Yesterday/Now" HTTP response header

Last-Modified: Mon, 24 Sep 2018 09:23:32 GMT

and should respond with 304-Not Modified if you request it (twice) with an "If-Modified-Since: Today/Now" HTTP request header:

If-Modified-Since: Tue, 25 Sep 2018 09:23:32 GMT

(Please read the tutorial, and here is a tool to test Last-Modified/If-Modified-Since/Not-Modified functionality.)

Here is your HTTP request header:

[GET:] /tools/last-modified-yesterday.php
[Accept:] text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
[Accept-Encoding:] gzip
[Connection:] Keep-Alive
[Host:] sebastians-pamphlets.com
[If-Modified-Since:] Sun, 22 Jul 2018 20:14:09 CEST
[User-Agent:] CCBot/2.0 (https://commoncrawl.org/faq/)

If-modified-since: Sun, 22 Jul 2018 18:14:09 GMT
Last-modified....: Mon, 24 Sep 2018 09:23:32 GMT