Yes I have examined this theme, but I just get lost: a child theme, of a theme that I am not using, with functions embedded in a file which is in a subfolder of this child theme, referring to the plugin! The structure si way too complex for me.
My origninal question was: the date, simply put. I guess that there is no simple way to achieve this, without being an experienced PHP progammer.
In the best case scenario, there would be a text box in the plugin option page where we would simple enter the format of the date.