Merge 4c6b196902 into bb0e4ce581

web_src/js/utils/time.js

@@ -4,8 +4,8 @@ import {getCurrentLocale} from '../utils.js';
 // Returns an array of millisecond-timestamps of start-of-week days (Sundays)
 export function startDaysBetween(startDate, endDate) {
   // Ensure the start date is a Sunday
-  while (startDate.getDay() !== 0) {
-    startDate.setDate(startDate.getDate() + 1);
+  while (startDate.getUTCDay() !== 0) {
+    startDate.setUTCDate(startDate.getUTCDate() + 1);
   }
 
   const start = dayjs(startDate);
@@ -29,10 +29,10 @@ export function firstStartDateAfterDate(inputDate) {
   if (!(inputDate instanceof Date)) {
     throw new Error('Invalid date');
   }
-  const dayOfWeek = inputDate.getDay();
+  const dayOfWeek = inputDate.getUTCDay();
   const daysUntilSunday = 7 - dayOfWeek;
   const resultDate = new Date(inputDate.getTime());
-  resultDate.setDate(resultDate.getDate() + daysUntilSunday);
+  resultDate.setUTCDate(resultDate.getUTCDate() + daysUntilSunday);
   return resultDate.valueOf();
 }