Fixed #29056 -- Fixed HTML5 validation of required SelectDateWidget.

placeholder is required for "select" with "required" attribute.

1 files changed, 15 insertions, 3 deletions

diff --git a/django/forms/widgets.py b/django/forms/widgets.py
index e944091f0d..c8ec3c35d5 100644
--- a/django/forms/widgets.py
+++ b/django/forms/widgets.py
@@ -979,7 +979,11 @@ class SelectDateWidget(Widget):
         date_context['year'] = self.select_widget(attrs, choices=year_choices).get_context(
             name=year_name,
             value=context['widget']['value']['year'],
-            attrs={**context['widget']['attrs'], 'id': 'id_%s' % year_name},
+            attrs={
+                **context['widget']['attrs'],
+                'id': 'id_%s' % year_name,
+                'placeholder': _('Year') if self.is_required else False,
+            },
         )
         month_choices = list(self.months.items())
         if not self.is_required:
@@ -988,7 +992,11 @@ class SelectDateWidget(Widget):
         date_context['month'] = self.select_widget(attrs, choices=month_choices).get_context(
             name=month_name,
             value=context['widget']['value']['month'],
-            attrs={**context['widget']['attrs'], 'id': 'id_%s' % month_name},
+            attrs={
+                **context['widget']['attrs'],
+                'id': 'id_%s' % month_name,
+                'placeholder': _('Month') if self.is_required else False,
+            },
         )
         day_choices = [(i, i) for i in range(1, 32)]
         if not self.is_required:
@@ -997,7 +1005,11 @@ class SelectDateWidget(Widget):
         date_context['day'] = self.select_widget(attrs, choices=day_choices,).get_context(
             name=day_name,
             value=context['widget']['value']['day'],
-            attrs={**context['widget']['attrs'], 'id': 'id_%s' % day_name},
+            attrs={
+                **context['widget']['attrs'],
+                'id': 'id_%s' % day_name,
+                'placeholder': _('Day') if self.is_required else False,
+            },
         )
         subwidgets = []
         for field in self._parse_date_fmt():