Added the ability to save user settings.

app/Helpers/Helpers.php

@@ -0,0 +1,24 @@
+<?php declare(strict_types=1);
+
+namespace App\Helpers;
+
+use Illuminate\Support\Facades\Cache;
+use Illuminate\Support\Collection;
+
+final readonly class Helpers
+{
+    public static function getTimeZoneList(): Collection
+    {
+        return Cache::rememberForever('timezones_list_collection', function () {
+            $timezone = [];
+            foreach (timezone_identifiers_list(\DateTimeZone::ALL) as $key => $value) {
+                $timezone[$value] = $value . ' (UTC ' . now($value)->format('P') . ')';
+            }
+            return collect($timezone)->sortKeys();
+        });
+    }
+
+    public static function getUserTimeZone() {
+        return auth()->user()?->timezone ?? config('app.user_timezone');
+    }
+}