diff --git a/phpBB/index.php b/phpBB/index.php
index cc83641acd..3b58646af0 100644
--- a/phpBB/index.php
+++ b/phpBB/index.php
@@ -83,7 +83,7 @@ $legend = implode(', ', $legend);
 $birthday_list = '';
 if ($config['load_birthdays'] && $config['allow_birthdays'])
 {
-	$now = getdate(time() + $user->timezone + $user->dst - date('Z'));
+	$now = phpbb_gmgetdate(time() + $user->timezone + $user->dst);
 	$sql = 'SELECT u.user_id, u.username, u.user_colour, u.user_birthday
 		FROM ' . USERS_TABLE . ' u
 		LEFT JOIN ' . BANLIST_TABLE . " b ON (u.user_id = b.ban_userid)
diff --git a/phpBB/memberlist.php b/phpBB/memberlist.php
index 589877305f..b3800ca0dd 100644
--- a/phpBB/memberlist.php
+++ b/phpBB/memberlist.php
@@ -1667,7 +1667,7 @@ function show_profile($data, $user_notes_enabled = false, $warn_user_enabled = f
 
 		if ($bday_year)
 		{
-			$now = getdate(time() + $user->timezone + $user->dst - date('Z'));
+			$now = phpbb_gmgetdate(time() + $user->timezone + $user->dst);
 
 			$diff = $now['mon'] - $bday_month;
 			if ($diff == 0)
diff --git a/phpBB/viewtopic.php b/phpBB/viewtopic.php
index 08e82591de..3f73fe356a 100644
--- a/phpBB/viewtopic.php
+++ b/phpBB/viewtopic.php
@@ -995,7 +995,7 @@ $sql = $db->sql_build_query('SELECT', array(
 
 $result = $db->sql_query($sql);
 
-$now = getdate(time() + $user->timezone + $user->dst - date('Z'));
+$now = phpbb_gmgetdate(time() + $user->timezone + $user->dst);
 
 // Posts are stored in the $rowset array while $attach_list, $user_cache
 // and the global bbcode_bitfield are built