Add example using 12-hour time

flask_admin/model/base.py

@@ -369,10 +369,10 @@ class BaseModelView(BaseView, ActionsMixin):
         Note, changing the format of a DateTimeField will require changes to both form_widget_args and form_args::
 
             form_args = dict(
-                start=dict(format='%Y-%m-%d %H:%M') # changes how the input is parsed by strptime
+                start=dict(format='%Y-%m-%d %I:%M %p') # changes how the input is parsed by strptime (12 hour time)
             )
             form_widget_args = dict(
-                start={'data-date-format': u'yyyy-mm-dd hh:ii'} # changes how the DateTimeField displays the time
+                start={'data-date-format': u'yyyy-mm-dd HH:ii P', 'data-show-meridian': 'True'} # changes how the DateTimeField displays the time
             )
     """