From 327f37401669bbc1977775effd39d36a46517c14 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Miro=20Hron=C4=8Dok?= <miro@hroncok.cz>
Date: Mon, 1 Jul 2024 15:37:07 +0200
Subject: [PATCH] Backport PR #1248: Avoid a DeprecationWarning on Python 3.13+

---
 ipykernel/jsonutil.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ipykernel/jsonutil.py b/ipykernel/jsonutil.py
index 6a463cf1..e45f06e5 100644
--- a/ipykernel/jsonutil.py
+++ b/ipykernel/jsonutil.py
@@ -26,7 +26,7 @@
 
 # holy crap, strptime is not threadsafe.
 # Calling it once at import seems to help.
-datetime.strptime("1", "%d")
+datetime.strptime("2000-01-01", "%Y-%m-%d")
 
 # -----------------------------------------------------------------------------
 # Classes and functions