first upload all files

Modules/Support/TimeZone.php

@@ -0,0 +1,31 @@
+<?php
+
+namespace Modules\Support;
+
+use DateTimeZone;
+
+class TimeZone
+{
+    /**
+     * Array of all time zones.
+     *
+     * @var array
+     */
+    private static $timeZones;
+
+    /**
+     * Get all defined time zones.
+     *
+     * @return array
+     */
+    public static function all()
+    {
+        if (! is_null(self::$timeZones)) {
+            return self::$timeZones;
+        }
+
+        $timeZones = DateTimeZone::listIdentifiers(DateTimeZone::ALL);
+
+        return self::$timeZones = array_combine($timeZones, $timeZones);
+    }
+}