"Fedora Core 1" was the first version of Fedora and was released on November 6, 2003, and was codenamed Yarrow. Fedora Core 1 was based on Red Hat Linux 9 and shipped with version 2.4.19 of the Linux kernel, version 2.4 of the GNOME desktop environment, and version 3.1.4 of KDE (the K Desktop Environment).