Standardise date to local date in one function for message headers. Try timezone but may switch back to offset if problems.

Rocksolid_Light/common/header.php

@@ -12,6 +12,16 @@ $CONFIG = include $config_file;
 $menulist = get_section_menu_array();
 $linklist = file($config_dir . "links.conf", FILE_IGNORE_NEW_LINES);
 
+// Set tzo if possible
+?>
+   <script type="text/javascript">
+     if (navigator.cookieEnabled)
+       document.cookie = "tzo="+ (- new Date().getTimezoneOffset())+"; path=/";
+       var tzid = new Intl.DateTimeFormat().resolvedOptions().timeZone;
+       document.cookie = "tzid=" + tzid + "; path=/";
+   </script>
+<?php
+
 if (isset($_COOKIE['mail_name']) && isset($_COOKIE['pkey'])) {
     $user = strtolower($_COOKIE['mail_name']);
     if (! isset($_SESSION['theme']) && file_exists($config_dir . '/userconfig/' . $user . '.config')) {

Rocksolid_Light/rocksolid/lib/message.inc.php

@@ -402,11 +402,6 @@ function show_header($head, $group, $local_poster = false)
         return;
     }
 
-    if (isset($_COOKIE['tzo'])) {
-        $offset = $_COOKIE['tzo'];
-    } else {
-        $offset = intval($CONFIG['timezone']);
-    }
     echo '<div class="np_article_header">';
     if ($article_show["Subject"])
         echo $text_header["subject"] . htmlspecialchars($head->subject) . "<br>";
@@ -462,17 +457,10 @@ function show_header($head, $group, $local_poster = false)
     if ((isset($head->organization)) && ($article_show["Organization"]) && ($head->organization != ""))
         echo $text_header["organization"] . html_parse(htmlspecialchars($head->organization)) . "<br>\n";
     if ($article_show["Date"]) {
-        $ts = new DateTime(date($text_header["date_format"], $head->date), new DateTimeZone('UTC'));
+        // Try to use client timezone else default to UTC
-        $ts->add(DateInterval::createFromDateString($offset . ' minutes'));
+        $displaydate = get_date_for_client_timezone($head->date);
-        if ($offset != 0) {
+        echo $displaydate;
-            echo $text_header["date"] . $ts->format('D, j M Y H:i') . "<br>\n";
-        } else {
-            echo $text_header["date"] . $ts->format($text_header["date_format"]) . "<br>\n";
-        }
-        unset($ts);
     }
-
-    // echo $text_header["date"].date($text_header["date_format"],$head->date)."<br>\n";
     if ($article_show["Message-ID"]) {
         echo ' ' . $text_header["message-id"] . htmlspecialchars($head->id) . "<br>\n";
     }
@@ -517,21 +505,15 @@ function show_header($head, $group, $local_poster = false)
 function show_header_short($head, $group, $local_poster = false)
 {
     global $article_show, $text_header, $file_article, $file_thread, $attachment_show;
-    global $file_attachment, $anonym_address, $CONFIG, $config_name, $sitelink;
+    global $file_attachment, $CONFIG, $config_name, $sitelink;
     global $OVERRIDES;
 
-    if (isset($_COOKIE['tzo'])) {
-        $offset = $_COOKIE['tzo'];
-    } else {
-        $offset = intval($CONFIG['timezone']);
-    }
     echo '<div class="np_article_header">';
     echo '<b>';
     if ($article_show["Subject"]) {
         echo htmlspecialchars($head->subject) . "<br>";
     }
     echo '</b>';
-    $poster = address_decode($head->from, "nowhere");
     if ($head->name != "") {
         $displayname = create_name_link($head->name, $head->from);
     } else {
@@ -541,14 +523,10 @@ function show_header_short($head, $group, $local_poster = false)
             $displayname = htmlspecialchars($head->from);
         }
     }
-    $ts = new DateTime(date($text_header["date_format"], $head->date), new DateTimeZone('UTC'));
+
-    $ts->add(DateInterval::createFromDateString($offset . ' minutes'));
+    // Try to use client timezone else default to UTC
-    if ($offset != 0) {
+    $displaydate = get_date_for_client_timezone($head->date);
-        $displaydate = $ts->format('D, j M Y H:i') . "<br>\n";
+
-    } else {
-        $displaydate = $ts->format($text_header["date_format"]) . "<br>\n";
-    }
-    unset($ts);
     echo '<div class=np_ob_posted_date>';
 
     // Copy MID to clipboard (requires js)

Rocksolid_Light/rocksolid/newsportal.php

@@ -1390,6 +1390,33 @@ function set_user_logged_in_cookies($name, $keys)
 <?php
     return true;
 }
+function get_date_for_client_timezone($date)
+{
+    global $text_header, $CONFIG;
+    if (isset($_COOKIE['tzo'])) {
+        $offset = $_COOKIE['tzo'];
+    } else {
+        $offset = intval($CONFIG['timezone']);
+    }
+    if (isset($_COOKIE['tzid'])) {
+        $datetime = new DateTime(date($text_header["date_format"], $date));
+        $client_time = new DateTimeZone($_COOKIE['tzid']);
+        $datetime->setTimezone($client_time);
+        $displaydate =  $datetime->format('D, j M Y H:i T');
+    } else {
+        $datetime = new DateTime(date($text_header["date_format"], $date), new DateTimeZone('UTC'));
+        $datetime->add(DateInterval::createFromDateString($offset . ' minutes'));
+        if ($offset != 0) {
+            $offset_hours = ($offset / 60) * 100;
+            $displaydate = $datetime->format('D, j M Y H:i') . " " . sprintf('%05d', $offset_hours) . "<br>\n";
+        } else {
+            $offset_hours = ($offset / 60) * 100;
+            $displaydate = $datetime->format($text_header["date_format"]) . "<br>\n";
+        }
+    }
+    unset($datetime);
+    return $displaydate;
+}
 
 function check_bbs_auth($username, $password, $sockip = null)
 {
@@ -1688,7 +1715,7 @@ function get_section_menu_array()
             $newmenu[] = $menuentry;
         }
     }
-        return $newmenu;
+    return $newmenu;
 }
 
 function wipe_newsportal_spool_info($group)