Optionally use wtforms.ext.dateutil.fields.DateTimeField if it is available

flask_admin/contrib/sqlamodel/form.py

 from wtforms import fields, validators
-# Field has better input parsing capabilities.
-from wtforms.ext.dateutil.fields import DateTimeField
 from sqlalchemy import Boolean, Column
 
 from flask.ext.admin import form
@@ -11,6 +9,12 @@ from flask.ext.admin.model.form import (converts, ModelConverterBase,
 from .validators import Unique
 from .fields import QuerySelectField, QuerySelectMultipleField, InlineModelFormList
 
+try:
+    # Field has better input parsing capabilities.
+    from wtforms.ext.dateutil.fields import DateTimeField
+except ImportError:
+    from wtforms.fields import DateTimeField
+
 
 class AdminModelConverter(ModelConverterBase):
     """