diff --git a/Lib/test/support/__init__.py b/Lib/test/support/__init__.py
index 01bb57ec44f..fc1b86bebcd 100644
--- a/Lib/test/support/__init__.py
+++ b/Lib/test/support/__init__.py
@@ -521,10 +521,13 @@ def requires_subprocess():
     return unittest.skipUnless(has_subprocess_support, "requires subprocess support")
 
 # Does strftime() support glibc extension like '%4Y'?
-try:
-    has_strftime_extensions = time.strftime("%4Y") != "%4Y"
-except ValueError:
-    has_strftime_extensions = False
+has_strftime_extensions = False
+if sys.platform != "win32":
+    # bpo-47037: Windows debug builds crash with "Debug Assertion Failed"
+    try:
+        has_strftime_extensions = time.strftime("%4Y") != "%4Y"
+    except ValueError:
+        pass
 
 # Define the URL of a dedicated HTTP server for the network tests.
 # The URL must use clear-text HTTP: no redirection to encrypted HTTPS.
diff --git a/Misc/NEWS.d/next/Tests/2022-03-16-21-29-30.bpo-47037.xcrLpJ.rst b/Misc/NEWS.d/next/Tests/2022-03-16-21-29-30.bpo-47037.xcrLpJ.rst
new file mode 100644
index 00000000000..f4f28d1e9a0
--- /dev/null
+++ b/Misc/NEWS.d/next/Tests/2022-03-16-21-29-30.bpo-47037.xcrLpJ.rst
@@ -0,0 +1,2 @@
+Skip ``strftime("%4Y")`` feature test on Windows. It can cause an assertion
+error in debug builds.