Card game with incomprehensible rules

But realistically rather 6+, because you can read the game necessarily (weekdays read)!
Alternatively, you have to be able to read numbers.

At the same time the manual is written in such a misleading (you have to put the cards according to the weekdays, however, is unclear as the week begins again from scratch if a Joker card is played), that it is unclear how the game is supposed to run.

Perhaps it is also a translation error the instructions, who knows ...