From 99c8ce5ab96d5278c1d4a1a5e68ea8c026cd22de Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Agn=C3=A8s=20Toulet?=
 <35176601+AgnesToulet@users.noreply.github.com>
Date: Tue, 14 Jun 2022 15:12:52 +0200
Subject: [PATCH] GrafanaData: Fix week start for non-English browsers (#50582)

* grafana-data: Fix start week for non-English browsers

* apply review suggestion
---
 packages/grafana-data/src/datetime/moment_wrapper.ts | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/packages/grafana-data/src/datetime/moment_wrapper.ts b/packages/grafana-data/src/datetime/moment_wrapper.ts
index c22b045d796..4bcfab24659 100644
--- a/packages/grafana-data/src/datetime/moment_wrapper.ts
+++ b/packages/grafana-data/src/datetime/moment_wrapper.ts
@@ -126,10 +126,15 @@ export const getWeekdayIndex = (day: string) => {
   return moment.weekdays().findIndex((wd) => wd.toLowerCase() === day.toLowerCase());
 };
 
+export const getWeekdayIndexByEnglishName = (day: string) =>
+  ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'].findIndex(
+    (wd) => wd.toLowerCase() === day.toLowerCase()
+  );
+
 export const setWeekStart = (weekStart?: string) => {
   const suffix = '-weekStart';
   const language = getLocale().replace(suffix, '');
-  const dow = weekStart ? getWeekdayIndex(weekStart) : -1;
+  const dow = weekStart ? getWeekdayIndexByEnglishName(weekStart) : -1;
   if (dow !== -1) {
     moment.locale(language + suffix, {
       parentLocale: language,