Hi,
I am looking for something like the tikz kalender.
In other words an annual calendar, which calculates itself according to the year, fits 6 months on an A4 in landscape, and takes import files (perhaps in YAML or CSV) for the immovable holidays, for the movable holidays, and a number of files to be loaded, for example, travel dates vacation and one for names.
Each of those file entries should have a fill color associated with it.
Obviously one would put the same color for each holiday, probably the same as one uses for Sundays. A lighter color variation of Sundays for the Saturdays.
And in the other files the colors are manually assigned to the pairings.
See the CTAN Example.