diff --git a/loopback/util/log.js b/loopback/util/log.js
index 76e87781d9..d2b78ce706 100644
--- a/loopback/util/log.js
+++ b/loopback/util/log.js
@@ -85,8 +85,12 @@ exports.translateValues = async(instance, changes, options = {}) => {
 exports.getChanges = (original, changes) => {
     const oldChanges = {};
     const newChanges = {};
+    const dateRegex = /^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}\.\d{3}Z$/;
 
     for (let property in changes) {
+        if (dateRegex.test(original[property]))
+            original[property] = new Date(Date.parse(original[property]));
+
         const firstChar = property.substring(0, 1);
         const isPrivate = firstChar == '$';
         if (isPrivate) return;