From 530c67ca66cc0b3b909be0c3a200f4c05cbb462d Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Mon, 15 Jun 2026 06:29:17 +0000
Subject: [PATCH] Fix month normalization in arxiv_to_publications_correct.py
 (same issue as #1098/#1099)

---
 bin/arxiv_to_publications_correct.py | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/bin/arxiv_to_publications_correct.py b/bin/arxiv_to_publications_correct.py
index a3ac8e1a..90490afb 100644
--- a/bin/arxiv_to_publications_correct.py
+++ b/bin/arxiv_to_publications_correct.py
@@ -2,12 +2,33 @@
 import requests
 import argparse
 import fileinput
+from html import unescape
 
 import bibtexparser
 from bibtexparser.bwriter import BibTexWriter
 from requests.exceptions import RequestException
 
 
+def normalize_month_fields(bib):
+    def replace_month(match):
+        prefix, value = match.groups()
+        value = unescape(value).strip()
+        if value.startswith("{") and value.endswith("}"):
+            return match.group(0)
+        if value.startswith('"') and value.endswith('"'):
+            value = value[1:-1].strip()
+        value = value.strip("'\"{}")
+        value = re.sub(r"[^A-Za-z]", "", value)
+        return f"{prefix}{{{value}}},"
+
+    return re.sub(
+        r"(^\s*month\s*=\s*)([^,\n]+)\s*,",
+        replace_month,
+        bib,
+        flags=re.MULTILINE | re.IGNORECASE,
+    )
+
+
 def fetch_doi_content(url, accept_header, description):
     try:
         response = requests.get(url, headers={'Accept': accept_header}, timeout=30)
@@ -83,6 +104,7 @@ def fetch_doi_content(url, accept_header, description):
             if id != id_db:
                 print(f'Note: ID updated from {id_db} to {id} to reflect the publication year.')
             bib = "{".join([bType] + [','.join([id]+rest2)] + rest1[1:])
+            bib = normalize_month_fields(bib)
             bib_db = bibtexparser.loads(bib)
             new_entries = bib_db.get_entry_list()
             if not new_entries: