Mainstream support ends on October 13, 2020, and most editions have extended support up to October 14, 2025.
The perpetually licensed version on macOS and Windows was released on September 22, 2015.
Since its successor Office 2019 only supports Windows 10 or Windows Server 2019, this is the last version of Microsoft Office compatible with Windows 7, Windows Server 2008 R2, Windows 8, Windows 8.1, Windows Server 2012, Windows Server 2012 R2, and Windows Server 2016.