From 2c540fdd22ee5c6791a0ed5688967388a593188d Mon Sep 17 00:00:00 2001
From: Jeff Epler <jepler@gmail.com>
Date: Sun, 19 May 2024 18:17:51 -0400
Subject: [PATCH] refer to UTC timezone portably

---
 leapseconddata/__init__.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/leapseconddata/__init__.py b/leapseconddata/__init__.py
index e76eb9e..9379422 100755
--- a/leapseconddata/__init__.py
+++ b/leapseconddata/__init__.py
@@ -84,7 +84,7 @@ class LeapSecondData:
 
     def _check_validity(self, when: Optional[datetime.datetime]) -> Optional[str]:
         if when is None:
-            when = datetime.datetime.now(datetime.UTC)
+            when = datetime.datetime.now(datetime.timezone.utc)
         if not self.valid_until:
             return "Data validity unknown"
         if when > self.valid_until: