diff --git a/lib/folder_views/journal_view.dart b/lib/folder_views/journal_view.dart
index cda7e702..dad617af 100644
--- a/lib/folder_views/journal_view.dart
+++ b/lib/folder_views/journal_view.dart
@@ -14,6 +14,9 @@ class JournalView extends StatelessWidget {
   final NotesFolder folder;
   final String emptyText;
 
+  static final _dateFormat = DateFormat('dd MMM, yyyy  ');
+  static final _timeFormat = DateFormat('Hm');
+
   JournalView({
     @required this.folder,
     @required this.noteSelectedFunction,
@@ -41,11 +44,8 @@ class JournalView extends StatelessWidget {
       date = note.created;
     }
     if (date != null) {
-      var formatter = DateFormat('dd MMM, yyyy  ');
-      var dateStr = formatter.format(date);
-
-      var timeFormatter = DateFormat('Hm');
-      var time = timeFormatter.format(date);
+      var dateStr = _dateFormat.format(date);
+      var time = _timeFormat.format(date);
 
       var timeColor = textTheme.body1.color.withAlpha(100);
 
diff --git a/lib/folder_views/standard_view.dart b/lib/folder_views/standard_view.dart
index c9ae0449..58609129 100644
--- a/lib/folder_views/standard_view.dart
+++ b/lib/folder_views/standard_view.dart
@@ -23,6 +23,8 @@ class StandardView extends StatelessWidget {
   final StandardViewHeader headerType;
   final bool showSummary;
 
+  static final _dateFormat = DateFormat('dd MMM, yyyy');
+
   StandardView({
     @required this.folder,
     @required this.noteSelectedFunction,
@@ -80,8 +82,7 @@ class StandardView extends StatelessWidget {
       date = note.created;
     }
     if (date != null) {
-      var formatter = DateFormat('dd MMM, yyyy');
-      var dateStr = formatter.format(date);
+      var dateStr = _dateFormat.format(date);
       trailing = Text(dateStr, style: textTheme.caption);
     }
 
diff --git a/lib/utils/datetime.dart b/lib/utils/datetime.dart
index 285720de..b9146139 100644
--- a/lib/utils/datetime.dart
+++ b/lib/utils/datetime.dart
@@ -1,16 +1,19 @@
 import 'dart:core';
 import 'package:intl/intl.dart';
 
+final _simpleDateFormat = DateFormat("yyyy-MM-dd-HH-mm-ss");
+final _iso8601DateFormat = DateFormat("yyyy-MM-ddTHH:mm:ss");
+
 String toSimpleDateTime(DateTime dt) {
-  return DateFormat("yyyy-MM-dd-HH-mm-ss").format(dt);
+  return _simpleDateFormat.format(dt);
 }
 
 String toIso8601(DateTime dt) {
-  return DateFormat("yyyy-MM-ddTHH:mm:ss").format(dt);
+  return _iso8601DateFormat.format(dt);
 }
 
 String toIso8601WithTimezone(DateTime dt, [Duration offset]) {
-  var result = DateFormat("yyyy-MM-ddTHH:mm:ss").format(dt);
+  var result = _iso8601DateFormat.format(dt);
 
   offset = offset ?? dt.timeZoneOffset;
   int minutes = (offset.inMinutes % 60);