well the only reason that Kiahk is that way is because Christmas as at it's end. The sundays readings are structured i believe in a way that there are 3 major topics, one for every 4 months....day's readings do not follow that because they are purely based on commemorations of saints.
I agree not every month has a standalone theme but there are some outside of the fasts and feasts that do have their own theme. I do not know the theme for Hatoor...
Comments
themes in reference to the readings...
popekirillos.net/EN/books/Coptfaml.pdf
God Bless
God bless!