diff --git a/ui/src/utils/formatters.js b/ui/src/utils/formatters.js
index d257ac73..25daa33d 100644
--- a/ui/src/utils/formatters.js
+++ b/ui/src/utils/formatters.js
@@ -25,7 +25,7 @@ export const formatDuration = (d) => {
   return `${days > 0 ? days + ':' : ''}${f}`
 }
 
-export const formatFullDate = (date) => {
+export const formatFullDate = (date, locale) => {
   const dashes = date.split('-').length - 1
   let options = {
     year: 'numeric',
@@ -36,5 +36,5 @@ export const formatFullDate = (date) => {
   if (dashes > 2 || (dashes === 0 && date.length > 4)) {
     return ''
   }
-  return new Date(date).toLocaleDateString(undefined, options)
+  return new Date(date).toLocaleDateString(locale, options)
 }
diff --git a/ui/src/utils/formatters.test.js b/ui/src/utils/formatters.test.js
index 610143ff..b3e898ed 100644
--- a/ui/src/utils/formatters.test.js
+++ b/ui/src/utils/formatters.test.js
@@ -33,17 +33,10 @@ describe('formatDuration', () => {
 })
 
 describe('formatFullDate', () => {
-  beforeAll(() => {
-    const toLocaleString = Date.prototype.toLocaleString
-    // eslint-disable-next-line no-extend-native
-    Date.prototype.toLocaleString = function (locale = 'en-US', ...args) {
-      return toLocaleString.call(this, locale, ...args)
-    }
-  })
-  it('format bytes', () => {
-    expect(formatFullDate('2011')).toEqual('2011')
-    expect(formatFullDate('2011-06')).toEqual('Jun 2011')
-    expect(formatFullDate('1985-01-01')).toEqual('Jan 1, 1985')
+  it('format dates', () => {
+    expect(formatFullDate('2011', 'en-US')).toEqual('2011')
+    expect(formatFullDate('2011-06', 'en-US')).toEqual('Jun 2011')
+    expect(formatFullDate('1985-01-01', 'en-US')).toEqual('Jan 1, 1985')
     expect(formatFullDate('199704')).toEqual('')
   })
 })