diff --git a/news/415.bugfix b/news/415.bugfix
new file mode 100644
index 000000000..104125335
--- /dev/null
+++ b/news/415.bugfix
@@ -0,0 +1,6 @@
+Relax DateTime widget definition.
+
+For the start and end fields, do not explicitly define the DateTimeFieldWidget.
+This allows for easier customization when a different widget needs to be used
+for any DateTime field.
+[thet]
diff --git a/plone/app/event/dx/behaviors.py b/plone/app/event/dx/behaviors.py
index f85951050..21931f26f 100644
--- a/plone/app/event/dx/behaviors.py
+++ b/plone/app/event/dx/behaviors.py
@@ -15,7 +15,6 @@
 from plone.app.event.dx.interfaces import IDXEvent
 from plone.app.event.dx.interfaces import IDXEventRecurrence
 from plone.app.textfield.value import RichTextValue
-from plone.app.z3cform.widgets.datetime import DatetimeFieldWidget
 from plone.autoform import directives
 from plone.autoform.interfaces import IFormFieldProvider
 from plone.base.utils import safe_text
@@ -89,7 +88,6 @@ class IEventBasic(model.Schema, IDXEvent):
     )
     directives.widget(
         "start",
-        DatetimeFieldWidget,
         default_timezone=default_timezone,
         klass="event_start",
     )
@@ -102,7 +100,6 @@ class IEventBasic(model.Schema, IDXEvent):
     )
     directives.widget(
         "end",
-        DatetimeFieldWidget,
         default_timezone=default_timezone,
         klass="event_end",
         pattern_options={