Backport fix for bug #1643943.
diff --git a/Misc/NEWS b/Misc/NEWS
index 21742f3..d776f49 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -154,6 +154,8 @@
 Library
 -------
 
+- Bug #1643943: Fix %U handling for time.strptime.
+
 - Patch #1643874: memory leak in ctypes fixed.
 
 - Bug #1598181: Avoid O(N**2) bottleneck in subprocess communicate().