Allow to show times in the UI in the timezone of the server (#16799)

test/common/string/format_number.ts

@@ -12,6 +12,7 @@ import {
   TimeFormat,
   FirstWeekday,
   DateFormat,
+  TimeZone,
 } from "../../../src/data/translation";
 
 describe("formatNumber", () => {
@@ -21,6 +22,7 @@ describe("formatNumber", () => {
     number_format: NumberFormat.language,
     time_format: TimeFormat.language,
     date_format: DateFormat.language,
+    time_zone: TimeZone.local,
     first_weekday: FirstWeekday.language,
   };