2 files changed, 6 insertions, 7 deletions
diff --git a/app/php/components/TimezoneSelect.php b/app/php/components/TimezoneSelect.php
index 5825b1a..50dc494 100644
--- a/app/php/components/TimezoneSelect.php
+++ b/app/php/components/TimezoneSelect.php
@@ -41,13 +41,7 @@ class TimezoneSelect extends TTemplateControl {
             },
             DateTimeZone::listIdentifiers()
         );
-        usort(
-            $timezones,
-            function($tz1, $tz2) {
-                $diff = $tz1->Offset - $tz2->Offset;
-                return ($diff == 0) ? strcmp($tz1->Name, $tz2->Name) : $diff;
-            }
-        );
+        usort($timezones, ['TimezoneDTO', '__compare']);
         return $timezones;
     }
 
diff --git a/app/php/dto/TimezoneDTO.php b/app/php/dto/TimezoneDTO.php
index 4bb57f2..d80d4dd 100644
--- a/app/php/dto/TimezoneDTO.php
+++ b/app/php/dto/TimezoneDTO.php
@@ -17,6 +17,11 @@ class TimezoneDTO {
         $this->Label = sprintf('UTC%+03d:%02d %s', $this->OffsetHours, $this->OffsetMinutes, $this->Name);
     }
 
+    public static function __compare(TimezoneDTO $tz1, TimezoneDTO $tz2) {
+        $diff = $tz1->Offset - $tz2->Offset;
+        return ($diff == 0) ? strcmp($tz1->Name, $tz2->Name) : $diff;
+    }
+
 }
 
 ?>