diff --git a/src/components/Chart.vue b/src/components/Chart.vue
index a6ccba7..3af0591 100644
--- a/src/components/Chart.vue
+++ b/src/components/Chart.vue
@@ -67,7 +67,7 @@ export default {
             second: '%H:%M:%S',
             minute: '%H:%M',
             hour: '%H:%M',
-            day: '%e %b',
+            day: '%a %e %b',
             week: '%e %b',
             month: '%b \'%y',
             year: '%Y'