diff --git a/.eslintrc b/.eslintrc
index 701d7f9fbc..3873b850f1 100644
--- a/.eslintrc
+++ b/.eslintrc
@@ -18,7 +18,7 @@
         "no-extend-native": [2, {"exceptions": ["Date", "String"]}],
         "no-multi-spaces": [2],
         "no-octal-escape": [2],
-        "no-underscore-dangle": [1],
+        "no-underscore-dangle": [2],
         "no-unused-vars": [2, {"vars": "local", "args": "none"}],
         "no-script-url": [1],
         "no-shadow": [2, {"hoist": "functions"}],
diff --git a/django/contrib/admin/static/admin/js/calendar.js b/django/contrib/admin/static/admin/js/calendar.js
index bc64634bad..3083ca8b1a 100644
--- a/django/contrib/admin/static/admin/js/calendar.js
+++ b/django/contrib/admin/static/admin/js/calendar.js
@@ -68,13 +68,13 @@ var CalendarNamespace = {
         var startingPos = new Date(year, month - 1, 1 - CalendarNamespace.firstDayOfWeek).getDay();
         var days = CalendarNamespace.getDaysInMonth(month, year);
 
-        var _cell;
+        var nonDayCell;
 
         // Draw blanks before first of month
         tableRow = quickElement('tr', tableBody);
         for (i = 0; i < startingPos; i++) {
-            _cell = quickElement('td', tableRow, ' ');
-            _cell.className = "nonday";
+            nonDayCell = quickElement('td', tableRow, ' ');
+            nonDayCell.className = "nonday";
         }
 
         // Draw days of month
@@ -105,8 +105,8 @@ var CalendarNamespace = {
 
         // Draw blanks after end of month (optional, but makes for valid code)
         while (tableRow.childNodes.length < 7) {
-            _cell = quickElement('td', tableRow, ' ');
-            _cell.className = "nonday";
+            nonDayCell = quickElement('td', tableRow, ' ');
+            nonDayCell.className = "nonday";
         }
 
         calDiv.appendChild(calTable);