From c3aa2aeae43992973d3078afcea6e3a34ec97d57 Mon Sep 17 00:00:00 2001
From: Zach Sherman <zsherman@anl.gov>
Date: Thu, 11 Apr 2024 15:36:34 -0500
Subject: [PATCH] FIX: Updates datetime.utcnow to .now using timezone object.
 (#1556)

---
 pyart/io/mdv_grid.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/pyart/io/mdv_grid.py b/pyart/io/mdv_grid.py
index c154512af9..0c0ad54c70 100644
--- a/pyart/io/mdv_grid.py
+++ b/pyart/io/mdv_grid.py
@@ -109,7 +109,9 @@ def write_grid_mdv(filename, grid, mdv_field_names=None, field_write_order=None)
     d["max_nx"] = nx
     d["max_ny"] = ny
     d["max_nz"] = nz
-    td = datetime.datetime.utcnow() - datetime.datetime(1970, 1, 1, 0, 0)
+    td = datetime.datetime.now(datetime.timezone.utc) - datetime.datetime(
+        1970, 1, 1, 0, 0
+    )
     d["time_written"] = int(
         round(td.microseconds + (td.seconds + td.days * 24 * 3600) * 10**6) / 10**6
     )