Sadhu Sadhu Sadhu!
Can we assume that the epubs are updated as well? The only way I can figure out the creation date of the files is to change the .epub extension to .zip and then explore the file without actually unzipping. Unzipping puts a new creation date on the files inside the container, but just exploring seems to indicate the real creation date of the individual files.
It would be great if the creation date of the epubs could be included in the text itself so people less familar with the innards of an epub could know what version they are looking at.
Any way, deep gratitude to all involved!