title: Cookie expiration is setting wrong
body: <p>I use PHP Header to set a persistent cookie in browsers. The PHP Header looks like this</p>
  
  <pre><code>$uuid = vsprintf('%s%s-%s-%s-%s-%s%s%s', str_split(bin2hex(random_bytes(16)), 4));
  header( "Set-Cookie: userid=$uuid ; Expires=Wed, 28 Oct 2020 14:28:00 GMT;  Path=/ ; secure ; httpOnly ;SameSite=Strict" );
  </code></pre>
  
  <p>When I do this, even though the expiration period is set to <code>Wed, 28 Oct 2020 14:28:00 GMT</code>, the expiration date seems to be after about 6-8 hrs when I check with a cookie editor plugin on chrome.</p>
  
  <p>What am I doing wrong?</p>