diff --git a/packages/core/i18n/src/i18n.spec.ts b/packages/core/i18n/src/i18n.spec.ts
index a902a3c146..a9d6884d65 100644
--- a/packages/core/i18n/src/i18n.spec.ts
+++ b/packages/core/i18n/src/i18n.spec.ts
@@ -158,6 +158,13 @@ describe('i18n', () => {
       const decimalTimestamp = formatIsoDate('2019-10-03T14:13:15.000Z')
       const integerTimestamp = formatIsoDate('2019-10-03T14:13:15.000Z')
 
+      expect(formatIsoDate('2019-10-03T14:13:15.123Z')).toBe('Oct 3, 2019, 2:13 PM')
+      expect(formatIsoDate('2019-10-03T14:13:15.000Z')).toBe('Oct 3, 2019, 2:13 PM')
+      expect(formatIsoDate('2019-10-03T14:13:15Z')).toBe('Oct 3, 2019, 2:13 PM')
+      expect(formatIsoDate('2019-05-16T11:42:59+00:00')).toBe('May 16, 2019, 11:42 AM')
+      expect(formatIsoDate('2019-05-16T11:42:59-04:00')).toBe('May 16, 2019, 3:42 PM')
+      expect(formatIsoDate('2019-05-16T11:42:59+08:00')).toBe('May 16, 2019, 3:42 AM')
+
       expect(formattedDateAM).toBe('May 16, 2019, 11:42 AM')
       expect(formattedDatePM).toBe('May 17, 2019, 1:39 AM')
       expect(january.substring(0, 7)).toBe('Jan 14,')
diff --git a/packages/core/i18n/src/i18n.ts b/packages/core/i18n/src/i18n.ts
index c3dccfca6d..562590ef07 100644
--- a/packages/core/i18n/src/i18n.ts
+++ b/packages/core/i18n/src/i18n.ts
@@ -93,7 +93,9 @@ export const createI18n = <MessageSource extends Record<string, any>>
   const formatIsoDate = (isoDate: string): string => {
     const date = Date.parse(isoDate) / 1000
 
-    return formatUnixTimeStamp(date)
+    // excludes milliseconds with trailing 0s
+    const flooredDate = Math.floor(date)
+    return formatUnixTimeStamp(flooredDate)
   }
 
   const t = (translationKey: PathToDotNotation<MessageSource, string>, values?: Record<string, MessageFormatPrimitiveValue> | undefined, opts?: IntlMessageFormatOptions): string => {