diff --git a/client/lib/api/who_date_format.dart b/client/lib/api/who_date_format.dart
new file mode 100644
index 0000000000..e921012309
--- /dev/null
+++ b/client/lib/api/who_date_format.dart
@@ -0,0 +1,9 @@
+import 'package:intl/intl.dart';
+
+extension WHOFormat on DateTime {
+  String get whoFormat => DateFormat.yMMMd().format(
+        // Timestamps are for midnight so the day it applies to is ambiguous.
+        // Sets date to UTC to match the WHO Dashboard: http://covid19.who.int
+        toUtc()
+      );
+}
diff --git a/client/lib/components/recent_numbers_graph.dart b/client/lib/components/recent_numbers_graph.dart
index 5e8e8035f0..f6ee19e74b 100644
--- a/client/lib/components/recent_numbers_graph.dart
+++ b/client/lib/components/recent_numbers_graph.dart
@@ -6,6 +6,7 @@ import 'package:who_app/components/themed_text.dart';
 import 'package:who_app/constants.dart';
 import 'package:who_app/pages/main_pages/recent_numbers.dart';
 import 'package:who_app/proto/api/who/who.pb.dart';
+import 'package:who_app/api/who_date_format.dart';
 
 const double padding = 30;
 const Duration defaultSwapDuration = Duration(
@@ -75,7 +76,7 @@ class _RecentNumbersBarGraphState extends State<RecentNumbersBarGraph> {
               final date = DateTime.fromMillisecondsSinceEpoch(
                   widget.timeseries[index].epochMsec.toInt());
               // Abbr to fit on single line: e.g. "Oct 18, 2020"
-              final formattedDate = DateFormat.yMMMd().format(date);
+              final formattedDate = date.whoFormat;
 
               final formattedCount = NumberFormat().format(barRodData.y);
 
@@ -269,11 +270,9 @@ class _RecentNumbersGraphState extends State<RecentNumbersGraph> {
     if (epochsMilliseconds == null) {
       return '';
     } else {
-      return DateFormat.MMMd().format(
-        DateTime.fromMillisecondsSinceEpoch(
-          epochsMilliseconds,
-        ),
-      );
+      return DateTime.fromMillisecondsSinceEpoch(
+        epochsMilliseconds,
+      ).whoFormat;
     }
   }