diff --git a/lib/isDate.js b/lib/isDate.js
index 1609bb86c..635536761 100644
--- a/lib/isDate.js
+++ b/lib/isDate.js
@@ -81,7 +81,7 @@ function isDate(str) {
   // check for valid double digits that could be late days
   // check for all matches since a string like '12/23' is a valid date
   // ignore everything with nearby colons
-  dayOrYearMatches = str.match(/(^|[^:\d])[23]\d([^:\d]|$)/g);
+  dayOrYearMatches = str.match(/(^|[^:\d])[23]\d([^T:\d]|$)/g);
   if (!dayOrYearMatches) {
     return true;
   }
@@ -97,4 +97,4 @@ function isDate(str) {
   }
   return false;
 }
-module.exports = exports['default'];
\ No newline at end of file
+module.exports = exports['default'];
diff --git a/test/validators.js b/test/validators.js
index d77b0ca7b..2f52549fa 100644
--- a/test/validators.js
+++ b/test/validators.js
@@ -1398,6 +1398,7 @@ describe('Validators', function () {
         '2015-10-20T00:53:09+12:00',
         '2007-04-06T00:00',
         '2010-02-18T16:23:48.5',
+        '2016-02-20T16:23:48.5',
         '200905',
         '2009-',
         '2009-05-19 14:',