diff --git a/dev/tools/gen_date_localizations.dart b/dev/tools/gen_date_localizations.dart
index d60fb5c0ef..8c0023e855 100644
--- a/dev/tools/gen_date_localizations.dart
+++ b/dev/tools/gen_date_localizations.dart
@@ -43,7 +43,7 @@ Future<Null> main(List<String> rawArgs) async {
     );
   }
 
-  final File dotPackagesFile = new File(path.join('packages', 'flutter', '.packages'));
+  final File dotPackagesFile = new File(path.join('packages', 'flutter_localizations', '.packages'));
   final bool dotPackagesExists = dotPackagesFile.existsSync();
 
   if (!dotPackagesExists) {
diff --git a/packages/flutter/lib/src/material/date_picker.dart b/packages/flutter/lib/src/material/date_picker.dart
index dff94601e1..7ef040a602 100644
--- a/packages/flutter/lib/src/material/date_picker.dart
+++ b/packages/flutter/lib/src/material/date_picker.dart
@@ -409,7 +409,7 @@ class DayPicker extends StatelessWidget {
         Widget dayWidget = new Container(
           decoration: decoration,
           child: new Center(
-            child: new Text(day.toString(), style: itemStyle),
+            child: new Text(localizations.formatDecimal(day), style: itemStyle),
           ),
         );
 
diff --git a/packages/flutter/lib/src/material/material_localizations.dart b/packages/flutter/lib/src/material/material_localizations.dart
index 9b429c2caa..a27674566b 100644
--- a/packages/flutter/lib/src/material/material_localizations.dart
+++ b/packages/flutter/lib/src/material/material_localizations.dart
@@ -114,6 +114,10 @@ abstract class MaterialLocalizations {
   /// See also: https://material.io/guidelines/style/typography.html
   TextTheme get localTextGeometry;
 
+  /// Formats [number] as a decimal, inserting locale-appropriate thousands
+  /// separators as necessary.
+  String formatDecimal(int number);
+
   /// Formats [TimeOfDay.hour] in the given time of day according to the value
   /// of [timeOfDayFormat].
   String formatHour(TimeOfDay timeOfDay);
@@ -314,7 +318,7 @@ class DefaultMaterialLocalizations implements MaterialLocalizations {
     return null;
   }
 
-  /// Formats an integer, inserting thousands separators as needed.
+  @override
   String formatDecimal(int number) {
     if (number > -1000 && number < 1000)
       return number.toString();
diff --git a/packages/flutter_localizations/flutter_localizations.iml b/packages/flutter_localizations/flutter_localizations.iml
index c2273989ce..5a5ced28c2 100644
--- a/packages/flutter_localizations/flutter_localizations.iml
+++ b/packages/flutter_localizations/flutter_localizations.iml
@@ -8,5 +8,7 @@
     </content>
     <orderEntry type="inheritedJdk" />
     <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="library" name="Dart SDK" level="project" />
+    <orderEntry type="library" name="Dart Packages" level="project" />
   </component>
 </module>
\ No newline at end of file
diff --git a/packages/flutter_localizations/lib/src/l10n/date_localizations.dart b/packages/flutter_localizations/lib/src/l10n/date_localizations.dart
index cc57d6bc83..e278edd638 100644
--- a/packages/flutter_localizations/lib/src/l10n/date_localizations.dart
+++ b/packages/flutter_localizations/lib/src/l10n/date_localizations.dart
@@ -184,6 +184,7 @@ const Map<String, dynamic> dateSymbols = const <String, dynamic>{
       r'''{1} {0}''',
       r'''{1} {0}'''
     ],
+    'ZERODIGIT': r'''٠''',
   },
   'de': const <String, dynamic>{
     'NAME': r'''de''',
@@ -899,6 +900,7 @@ const Map<String, dynamic> dateSymbols = const <String, dynamic>{
       r'''{1}،‏ {0}''',
       r'''{1}،‏ {0}'''
     ],
+    'ZERODIGIT': r'''۰''',
   },
   'fr': const <String, dynamic>{
     'NAME': r'''fr''',
@@ -1615,6 +1617,188 @@ const Map<String, dynamic> dateSymbols = const <String, dynamic>{
       r'''{1} {0}'''
     ],
   },
+  'ps': const <String, dynamic>{
+    'NAME': r'''ps''',
+    'ERAS': const <dynamic>[r'''له میلاد وړاندې''', r'''م.'''],
+    'ERANAMES': const <dynamic>[
+      r'''له میلاد څخه وړاندې''',
+      r'''له میلاد څخه وروسته'''
+    ],
+    'NARROWMONTHS': const <dynamic>[
+      r'''1''',
+      r'''2''',
+      r'''3''',
+      r'''4''',
+      r'''5''',
+      r'''6''',
+      r'''7''',
+      r'''8''',
+      r'''9''',
+      r'''10''',
+      r'''11''',
+      r'''12'''
+    ],
+    'STANDALONENARROWMONTHS': const <dynamic>[
+      r'''1''',
+      r'''2''',
+      r'''3''',
+      r'''4''',
+      r'''5''',
+      r'''6''',
+      r'''7''',
+      r'''8''',
+      r'''9''',
+      r'''10''',
+      r'''11''',
+      r'''12'''
+    ],
+    'MONTHS': const <dynamic>[
+      r'''جنوري''',
+      r'''فبروري''',
+      r'''مارچ''',
+      r'''اپریل''',
+      r'''مۍ''',
+      r'''جون''',
+      r'''جولای''',
+      r'''اګست''',
+      r'''سپتمبر''',
+      r'''اکتوبر''',
+      r'''نومبر''',
+      r'''دسمبر'''
+    ],
+    'STANDALONEMONTHS': const <dynamic>[
+      r'''جنوري''',
+      r'''فبروري''',
+      r'''مارچ''',
+      r'''اپریل''',
+      r'''مۍ''',
+      r'''جون''',
+      r'''جولای''',
+      r'''اګست''',
+      r'''سپتمبر''',
+      r'''اکتوبر''',
+      r'''نومبر''',
+      r'''دسمبر'''
+    ],
+    'SHORTMONTHS': const <dynamic>[
+      r'''جنوري''',
+      r'''فبروري''',
+      r'''مارچ''',
+      r'''اپریل''',
+      r'''مۍ''',
+      r'''جون''',
+      r'''جولای''',
+      r'''اګست''',
+      r'''سپتمبر''',
+      r'''اکتوبر''',
+      r'''نومبر''',
+      r'''دسمبر'''
+    ],
+    'STANDALONESHORTMONTHS': const <dynamic>[
+      r'''جنوري''',
+      r'''فبروري''',
+      r'''مارچ''',
+      r'''اپریل''',
+      r'''مۍ''',
+      r'''جون''',
+      r'''جولای''',
+      r'''اګست''',
+      r'''سپتمبر''',
+      r'''اکتوبر''',
+      r'''نومبر''',
+      r'''دسمبر'''
+    ],
+    'WEEKDAYS': const <dynamic>[
+      r'''یکشنبه''',
+      r'''دوشنبه''',
+      r'''سه‌شنبه''',
+      r'''چهارشنبه''',
+      r'''پنجشنبه''',
+      r'''جمعه''',
+      r'''شنبه'''
+    ],
+    'STANDALONEWEEKDAYS': const <dynamic>[
+      r'''یکشنبه''',
+      r'''دوشنبه''',
+      r'''سه‌شنبه''',
+      r'''چهارشنبه''',
+      r'''پنجشنبه''',
+      r'''جمعه''',
+      r'''شنبه'''
+    ],
+    'SHORTWEEKDAYS': const <dynamic>[
+      r'''یکشنبه''',
+      r'''دوشنبه''',
+      r'''سه‌شنبه''',
+      r'''چهارشنبه''',
+      r'''پنجشنبه''',
+      r'''جمعه''',
+      r'''شنبه'''
+    ],
+    'STANDALONESHORTWEEKDAYS': const <dynamic>[
+      r'''یکشنبه''',
+      r'''دوشنبه''',
+      r'''سه‌شنبه''',
+      r'''چهارشنبه''',
+      r'''پنجشنبه''',
+      r'''جمعه''',
+      r'''شنبه'''
+    ],
+    'NARROWWEEKDAYS': const <dynamic>[
+      r'''S''',
+      r'''M''',
+      r'''T''',
+      r'''W''',
+      r'''T''',
+      r'''F''',
+      r'''S'''
+    ],
+    'STANDALONENARROWWEEKDAYS': const <dynamic>[
+      r'''S''',
+      r'''M''',
+      r'''T''',
+      r'''W''',
+      r'''T''',
+      r'''F''',
+      r'''S'''
+    ],
+    'SHORTQUARTERS': const <dynamic>[
+      r'''لومړۍ ربعه''',
+      r'''۲مه ربعه''',
+      r'''۳مه ربعه''',
+      r'''۴مه ربعه'''
+    ],
+    'QUARTERS': const <dynamic>[
+      r'''لومړۍ ربعه''',
+      r'''۲مه ربعه''',
+      r'''۳مه ربعه''',
+      r'''۴مه ربعه'''
+    ],
+    'AMPMS': const <dynamic>[r'''غ.م.''', r'''غ.و.'''],
+    'DATEFORMATS': const <dynamic>[
+      r'''EEEE د y د MMMM d''',
+      r'''د y د MMMM d''',
+      r'''y MMM d''',
+      r'''y/M/d'''
+    ],
+    'TIMEFORMATS': const <dynamic>[
+      r'''H:mm:ss (zzzz)''',
+      r'''H:mm:ss (z)''',
+      r'''H:mm:ss''',
+      r'''H:mm'''
+    ],
+    'AVAILABLEFORMATS': null,
+    'FIRSTDAYOFWEEK': 5,
+    'WEEKENDRANGE': const <dynamic>[3, 4],
+    'FIRSTWEEKCUTOFFDAY': 4,
+    'DATETIMEFORMATS': const <dynamic>[
+      r'''{1} {0}''',
+      r'''{1} {0}''',
+      r'''{1} {0}''',
+      r'''{1} {0}'''
+    ],
+    'ZERODIGIT': r'''۰''',
+  },
   'pt': const <String, dynamic>{
     'NAME': r'''pt''',
     'ERAS': const <dynamic>[r'''a.C.''', r'''d.C.'''],
@@ -2749,6 +2933,52 @@ const Map<String, dynamic> datePatterns = const <String, dynamic>{
     'zzzz': r'''zzzz''',
     'ZZZZ': r'''ZZZZ''',
   },
+  'ps': const <String, dynamic>{
+    'd': r'''d''',
+    'E': r'''ccc''',
+    'EEEE': r'''cccc''',
+    'LLL': r'''LLL''',
+    'LLLL': r'''LLLL''',
+    'M': r'''L''',
+    'Md': r'''M/d''',
+    'MEd': r'''MM-dd, EEE''',
+    'MMM': r'''LLL''',
+    'MMMd': r'''MMM d''',
+    'MMMEd': r'''MMM d, EEE''',
+    'MMMM': r'''LLLL''',
+    'MMMMd': r'''d MMMM''',
+    'MMMMEEEEd': r'''MMMM d, EEEE''',
+    'QQQ': r'''QQQ''',
+    'QQQQ': r'''QQQQ''',
+    'y': r'''y''',
+    'yM': r'''y/M''',
+    'yMd': r'''y-MM-dd''',
+    'yMEd': r'''y-MM-dd, EEE''',
+    'yMMM': r'''y MMM''',
+    'yMMMd': r'''y MMM d''',
+    'yMMMEd': r'''y MMM d, EEE''',
+    'yMMMM': r'''د y د MMMM''',
+    'yMMMMd': r'''د y د MMMM d''',
+    'yMMMMEEEEd': r'''EEEE د y د MMMM d''',
+    'yQQQ': r'''y QQQ''',
+    'yQQQQ': r'''y QQQQ''',
+    'H': r'''H''',
+    'Hm': r'''H:mm''',
+    'Hms': r'''H:mm:ss''',
+    'j': r'''H''',
+    'jm': r'''H:mm''',
+    'jms': r'''H:mm:ss''',
+    'jmv': r'''HH:mm v''',
+    'jmz': r'''HH:mm z''',
+    'jz': r'''H (z)''',
+    'm': r'''m''',
+    'ms': r'''mm:ss''',
+    's': r'''s''',
+    'v': r'''v''',
+    'z': r'''z''',
+    'zzzz': r'''zzzz''',
+    'ZZZZ': r'''ZZZZ''',
+  },
   'pt': const <String, dynamic>{
     'd': r'''d''',
     'E': r'''ccc''',
@@ -2841,6 +3071,52 @@ const Map<String, dynamic> datePatterns = const <String, dynamic>{
     'zzzz': r'''zzzz''',
     'ZZZZ': r'''ZZZZ''',
   },
+  'sd': const <String, dynamic>{
+    'd': r'''d''',
+    'E': r'''ccc''',
+    'EEEE': r'''cccc''',
+    'LLL': r'''LLL''',
+    'LLLL': r'''LLLL''',
+    'M': r'''L''',
+    'Md': r'''M/d''',
+    'MEd': r'''EEE, M/d''',
+    'MMM': r'''LLL''',
+    'MMMd': r'''MMM d''',
+    'MMMEd': r'''EEE, MMM d''',
+    'MMMM': r'''LLLL''',
+    'MMMMd': r'''MMMM d''',
+    'MMMMEEEEd': r'''EEEE, MMMM d''',
+    'QQQ': r'''QQQ''',
+    'QQQQ': r'''QQQQ''',
+    'y': r'''y''',
+    'yM': r'''M/y''',
+    'yMd': r'''M/d/y''',
+    'yMEd': r'''EEE, M/d/y''',
+    'yMMM': r'''MMM y''',
+    'yMMMd': r'''MMM d, y''',
+    'yMMMEd': r'''EEE, MMM d, y''',
+    'yMMMM': r'''MMMM y''',
+    'yMMMMd': r'''MMMM d, y''',
+    'yMMMMEEEEd': r'''EEEE, MMMM d, y''',
+    'yQQQ': r'''QQQ y''',
+    'yQQQQ': r'''QQQQ y''',
+    'H': r'''HH''',
+    'Hm': r'''HH:mm''',
+    'Hms': r'''HH:mm:ss''',
+    'j': r'''h a''',
+    'jm': r'''h:mm a''',
+    'jms': r'''h:mm:ss a''',
+    'jmv': r'''h:mm a v''',
+    'jmz': r'''h:mm a z''',
+    'jz': r'''h a z''',
+    'm': r'''m''',
+    'ms': r'''mm:ss''',
+    's': r'''s''',
+    'v': r'''v''',
+    'z': r'''z''',
+    'zzzz': r'''zzzz''',
+    'ZZZZ': r'''ZZZZ''',
+  },
   'ur': const <String, dynamic>{
     'd': r'''d''',
     'E': r'''ccc''',
@@ -2865,7 +3141,7 @@ const Map<String, dynamic> datePatterns = const <String, dynamic>{
     'yMMM': r'''MMM y''',
     'yMMMd': r'''d MMM، y''',
     'yMMMEd': r'''EEE، d MMM، y''',
-    'yMMMM': r'''y MMMM''',
+    'yMMMM': r'''MMMM y''',
     'yMMMMd': r'''d MMMM، y''',
     'yMMMMEEEEd': r'''EEEE، d MMMM، y''',
     'yQQQ': r'''QQQ y''',
diff --git a/packages/flutter_localizations/lib/src/material_localizations.dart b/packages/flutter_localizations/lib/src/material_localizations.dart
index c2ec9cf348..6540440251 100644
--- a/packages/flutter_localizations/lib/src/material_localizations.dart
+++ b/packages/flutter_localizations/lib/src/material_localizations.dart
@@ -8,9 +8,7 @@ import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'package:intl/intl.dart' as intl;
 import 'package:intl/date_symbols.dart' as intl;
-// TODO(yjbanov): remove internal import when https://github.com/dart-lang/intl/issues/145 is fixed.
-// ignore: implementation_imports
-import 'package:intl/src/date_format_internal.dart' as date_format_internal;
+import 'package:intl/date_symbol_data_custom.dart' as date_symbol_data_custom;
 import 'l10n/date_localizations.dart' as date_localizations;
 
 import 'l10n/localizations.dart';
@@ -184,9 +182,7 @@ class GlobalMaterialLocalizations implements MaterialLocalizations {
   @override
   int get firstDayOfWeekIndex => (_fullYearFormat.dateSymbols.FIRSTDAYOFWEEK + 1) % 7;
 
-  /// Formats a [number] using local decimal number format.
-  ///
-  /// Inserts locale-appropriate thousands separator, if necessary.
+  @override
   String formatDecimal(int number) {
     return _decimalFormat.format(number);
   }
@@ -416,13 +412,14 @@ bool _dateIntlDataInitialized = false;
 /// data. Subsequent invocations have no effect.
 void _loadDateIntlDataIfNotLoaded() {
   if (!_dateIntlDataInitialized) {
-    date_format_internal.initializeDatePatterns(() => date_localizations.datePatterns);
-    date_format_internal.initializeDateSymbols(() {
-      final Map<String, intl.DateSymbols> symbols = <String, intl.DateSymbols>{};
-      date_localizations.dateSymbols.forEach((String locale, dynamic data) {
-        symbols[locale] = new intl.DateSymbols.deserializeFromMap(data);
-      });
-      return symbols;
+    date_localizations.dateSymbols.forEach((String locale, dynamic data) {
+      assert(date_localizations.datePatterns.containsKey(locale));
+      final intl.DateSymbols symbols = new intl.DateSymbols.deserializeFromMap(data);
+      date_symbol_data_custom.initializeDateFormattingCustom(
+        locale: locale,
+        symbols: symbols,
+        patterns: date_localizations.datePatterns[locale],
+      );
     });
     _dateIntlDataInitialized = true;
   }
diff --git a/packages/flutter_localizations/test/date_picker_test.dart b/packages/flutter_localizations/test/date_picker_test.dart
index 88f8ddff8d..dfb16a4537 100644
--- a/packages/flutter_localizations/test/date_picker_test.dart
+++ b/packages/flutter_localizations/test/date_picker_test.dart
@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'package:intl/intl.dart' as intl;
+
 import 'package:flutter/material.dart';
 import 'package:flutter_localizations/flutter_localizations.dart';
 import 'package:flutter_test/flutter_test.dart';
@@ -18,6 +20,7 @@ void main() {
   });
 
   group(DayPicker, () {
+    final intl.NumberFormat arabicNumbers = new intl.NumberFormat('0', 'ar');
     final Map<Locale, Map<String, dynamic>> testLocales = <Locale, Map<String, dynamic>>{
       // Tests the default.
       const Locale('en', 'US'): <String, dynamic>{
@@ -34,14 +37,11 @@ void main() {
         'expectedMonthYearHeader': 'сентябрь 2017 г.',
       },
       // Tests RTL.
-      // TODO: change to Arabic numerals when these are fixed:
-      // TODO: https://github.com/dart-lang/intl/issues/143
-      // TODO: https://github.com/flutter/flutter/issues/12289
       const Locale('ar', 'AR'): <String, dynamic>{
         'textDirection': TextDirection.rtl,
         'expectedDaysOfWeek': <String>['ح', 'ن', 'ث', 'ر', 'خ', 'ج', 'س'],
-        'expectedDaysOfMonth': new List<String>.generate(30, (int i) => '${i + 1}'),
-        'expectedMonthYearHeader': 'سبتمبر 2017',
+        'expectedDaysOfMonth': new List<String>.generate(30, (int i) => '${arabicNumbers.format(i + 1)}'),
+        'expectedMonthYearHeader': 'سبتمبر ٢٠١٧',
       },
     };