From 7b282df14a04a9a4cade081318a0da238fd47283 Mon Sep 17 00:00:00 2001
From: ShipItAndPray <noreply@users.noreply.github.com>
Date: Sun, 26 Apr 2026 22:03:47 -0500
Subject: [PATCH] Ignore blank PO revision dates

---
 babel/messages/catalog.py          |  2 +-
 tests/messages/test_pofile_read.py | 10 ++++++++++
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/babel/messages/catalog.py b/babel/messages/catalog.py
index 9a9739a72..f6f7eb862 100644
--- a/babel/messages/catalog.py
+++ b/babel/messages/catalog.py
@@ -585,7 +585,7 @@ def _set_mime_headers(self, headers: Iterable[tuple[str, str]]) -> None:
                 self.creation_date = _parse_datetime_header(value)
             elif name == 'po-revision-date':
                 # Keep the value if it's not the default one
-                if 'YEAR' not in value:
+                if value.strip() and 'YEAR' not in value:
                     self.revision_date = _parse_datetime_header(value)
 
     mime_headers = property(
diff --git a/tests/messages/test_pofile_read.py b/tests/messages/test_pofile_read.py
index d17f5d4af..cd963b44e 100644
--- a/tests/messages/test_pofile_read.py
+++ b/tests/messages/test_pofile_read.py
@@ -164,6 +164,16 @@ def test_header_entry():
     assert list(catalog)[0].fuzzy
 
 
+def test_header_entry_blank_revision_date():
+    buf = StringIO(r'''
+msgid ""
+msgstr ""
+"PO-Revision-Date: \n"
+''')
+    catalog = pofile.read_po(buf)
+    assert catalog.revision_date == 'YEAR-MO-DA HO:MI+ZONE'
+
+
 def test_obsolete_message():
     buf = StringIO(r'''# This is an obsolete message
 #~ msgid "foo"