diff --git a/projects/plugins/jetpack/_inc/client/at-a-glance/stats/dash-stats-bottom.jsx b/projects/plugins/jetpack/_inc/client/at-a-glance/stats/dash-stats-bottom.jsx
index 5fd5cd947e398..e15b60a92d6b6 100644
--- a/projects/plugins/jetpack/_inc/client/at-a-glance/stats/dash-stats-bottom.jsx
+++ b/projects/plugins/jetpack/_inc/client/at-a-glance/stats/dash-stats-bottom.jsx
@@ -70,9 +70,11 @@ class DashStatsBottom extends Component {
 										numberFormat( s.bestDay.count )
 								  ) }
 						</h3>
-						<p className="jp-at-a-glance__stat-details">
-							{ '-' === s.bestDay.day ? '-' : dateI18n( this.props.dateFormat, s.bestDay.day ) }
-						</p>
+						{ s.bestDay.day && (
+							<p className="jp-at-a-glance__stat-details">
+								{ '-' === s.bestDay.day ? '-' : dateI18n( this.props.dateFormat, s.bestDay.day ) }
+							</p>
+						) }
 					</div>
 					<div className="jp-at-a-glance__stats-summary-alltime-views">
 						<p className="jp-at-a-glance__stat-details">
diff --git a/projects/plugins/jetpack/changelog/fix-stats-best-day-new-site b/projects/plugins/jetpack/changelog/fix-stats-best-day-new-site
new file mode 100644
index 0000000000000..bf8fbd73c5958
--- /dev/null
+++ b/projects/plugins/jetpack/changelog/fix-stats-best-day-new-site
@@ -0,0 +1,4 @@
+Significance: patch
+Type: other
+
+Fix the 'invalid date' error on new site stats.