Note source code is available at https://github.com/phylotastic/datelife (the R package with this functionality), https://github.com/phylotastic/datelifeweb (the package that generates the web page), and https://github.com/phylotastic/datelifedocker (the docker file to create the image).
DateLife is part of the Phylotastic project, funded by NSF. It uses resources from the Open Tree of Life project, rOpenSci, and TreeBase. To help, please add trees to OpenTree's database! [they can be yours or others']