#H5YR or #h5yr means High 5, You Rock! And is the Umbraco community’s way of cheering for others for providing help or any kind of contribution to the Umbraco project.

The idea started at Codegarden 2010 during a talk by Alexander Kjerulf about happiness at work. The Umbraco community rapidly embraced the usage of #H5YR and it is widely used today.