Convert times to/from UTC

reminder-dashboard/src/components/TimezonePicker/index.tsx

@@ -1,4 +1,4 @@
-import { DateTime, SystemZone } from "luxon";
+import { DateTime } from "luxon";
 import { useMutation, useQuery, useQueryClient } from "react-query";
 import { fetchUserInfo, patchUserInfo } from "../../api";
 import { Modal } from "../Modal";
@@ -12,8 +12,8 @@ type DisplayProps = {
 const TimezoneDisplay = ({ timezone }: DisplayProps) => {
     const now = DateTime.now().setZone(timezone);
 
-    const hour = now.hour;
-    const minute = now.minute;
+    const hour = now.hour.toString().padStart(2, "0");
+    const minute = now.minute.toString().padStart(2, "0");
 
     return (
         <>
@@ -117,7 +117,7 @@ const TimezoneModal = ({ setModalOpen }) => {
                     </span>
                 </button>
                 <button
-                    class="button is-warning"
+                    class="button is-success is-outlined"
                     id="update-bot-timezone"
                     style={{
                         margin: "2px",