This article provides information about Microsoft support for the leap second. Applies to: Windows Server 2019, Windows Server 2016, Windows Server 2012 R2, Windows Server 2008 R2 Service Pack 1, Windows 10, version 2004, Windows 10, version 1909, Windows 10, version 1803, Windows 10, version 1709, Windows 7 Service Pack 1 Original KB number: 2722715 Summary This article contains information a