diff --git a/addons/web/static/src/js/view_form.js b/addons/web/static/src/js/view_form.js
index 5505cd16fe0..fa8b8713a8f 100644
--- a/addons/web/static/src/js/view_form.js
+++ b/addons/web/static/src/js/view_form.js
@@ -2378,7 +2378,10 @@ instance.web.DateTimeWidget = instance.web.Widget.extend({
         var self = this;
         this.$input = this.$el.find('input.oe_datepicker_master');
         this.$input_picker = this.$el.find('input.oe_datepicker_container');
-        this.$input.change(this.on_change);
+        this.$input.change(function(){
+            self.datetime_changed();
+        });
+        
         this.picker({
             onClose: this.on_picker_select,
             onSelect: this.on_picker_select,
@@ -2446,9 +2449,10 @@ instance.web.DateTimeWidget = instance.web.Widget.extend({
     format_client: function(v) {
         return instance.web.format_value(v, {"widget": this.type_of_date});
     },
-    on_change: function() {
+    datetime_changed: function() {
         if (this.is_valid_()) {
             this.set_value_from_ui_();
+            this.trigger("datetime_changed");
         }
     }
 });
@@ -2472,7 +2476,7 @@ instance.web.form.FieldDatetime = instance.web.form.AbstractField.extend(instanc
     initialize_content: function() {
         if (!this.get("effective_readonly")) {
             this.datewidget = this.build_widget();
-            this.datewidget.on_change.add_last(_.bind(function() {
+            this.datewidget.on('datetime_changed', this, _.bind(function() {
                 this.set({'value': this.datewidget.get_value()});
             }, this));
             this.datewidget.appendTo(this.$el);