diff --git a/controllers/Parse.php b/controllers/Parse.php
index 584b094..e172a53 100644
--- a/controllers/Parse.php
+++ b/controllers/Parse.php
@@ -91,7 +91,7 @@ class Parse {
       $url = \normalize_url($url);
 
       // Check if this is a Twitter URL and if they've provided API credentials, use the API
-      if(preg_match('/https?:\/\/(?:mobile\.twitter\.com|twitter\.com|twtr\.io)\/(?:[a-z0-9_\/!#]+statuse?s?\/([0-9]+)|([a-zA-Z0-9_]+))/', $url, $match)) {
+      if(preg_match('/https?:\/\/(?:mobile\.twitter\.com|twitter\.com|twtr\.io)\/(?:[a-z0-9_\/!#]+statuse?s?\/([0-9]+)|([a-zA-Z0-9_]+))/i', $url, $match)) {
         $fields = ['twitter_api_key','twitter_api_secret','twitter_access_token','twitter_access_token_secret'];
         $creds = [];
         foreach($fields as $f) {
diff --git a/lib/Formats/Twitter.php b/lib/Formats/Twitter.php
index 4935a69..e769f17 100644
--- a/lib/Formats/Twitter.php
+++ b/lib/Formats/Twitter.php
@@ -21,7 +21,11 @@ class Twitter {
         $tweet = $json;
     } else {
       $twitter = new \Twitter($creds['twitter_api_key'], $creds['twitter_api_secret'], $creds['twitter_access_token'], $creds['twitter_access_token_secret']);
-      $tweet = $twitter->request('statuses/show/'.$tweet_id, 'GET', ['tweet_mode'=>'extended']);
+      try { 
+        $tweet = $twitter->request('statuses/show/'.$tweet_id, 'GET', ['tweet_mode'=>'extended']);
+      } catch(\TwitterException $e) {
+        return false;
+      }
     }
 
     if(!$tweet)
@@ -74,7 +78,7 @@ class Twitter {
     // Published date
     $published = new DateTime($tweet->created_at);
     if(property_exists($tweet->user, 'utc_offset')) {
-      $tz = new DateTimeZone($tweet->user->utc_offset / 3600);
+      $tz = new DateTimeZone(sprintf('%+d', $tweet->user->utc_offset / 3600));
       $published->setTimeZone($tz);
     }
     $entry['published'] = $published->format('c');
diff --git a/tests/TwitterTest.php b/tests/TwitterTest.php
index 1f3c9e8..8a938f8 100644
--- a/tests/TwitterTest.php
+++ b/tests/TwitterTest.php
@@ -52,6 +52,13 @@ class TwitterTest extends PHPUnit_Framework_TestCase {
     $this->assertEquals('2017-01-10T12:13:18-08:00', $data['data']['published']);
   }
 
+  public function testPositiveTimezone() {
+    list($url, $json) = $this->loadTweet('719914707566649344');
+
+    $data = $this->parse(['url' => $url, 'json' => $json]);
+    $this->assertEquals("2016-04-12T16:46:56+01:00", $data['data']['published']);
+  }
+
   public function testTweetWithEmoji() {
     list($url, $json) = $this->loadTweet('818943244553699328');