Fixed #26281 -- Added a helpful error message for an invalid format specifier to dateformat.format().

1 files changed, 5 insertions, 0 deletions

diff --git a/django/utils/dateformat.py b/django/utils/dateformat.py
index ea55eaaf9d..f82e0098b8 100644
--- a/django/utils/dateformat.py
+++ b/django/utils/dateformat.py
@@ -34,6 +34,11 @@ class Formatter(object):
         pieces = []
         for i, piece in enumerate(re_formatchars.split(force_text(formatstr))):
             if i % 2:
+                if type(self.data) is datetime.date and hasattr(TimeFormat, piece):
+                    raise TypeError(
+                        "The format for date objects may not contain "
+                        "time-related format specifiers (found '%s')." % piece
+                    )
                 pieces.append(force_text(getattr(self, piece)()))
             elif piece:
                 pieces.append(re_escaped.sub(r'\1', piece))