''Le samedi'', "Le Dimanche", " Le mercredi" ??

Question

Im just a bit confused since before i could always say Le ....... But now, they are correcting me, just because of the ''le''.

This never happended before, please explain to me, why this is happening?

Accepted Answer

Karina, when talking about week days in a specific context, the definite article is not used. That applies to the narrative in this exercise.  
The definite article is used with week days in a number of other circumstances however. 
See attached lesson and associated similar questions and discussion previously. 
If there has been a change to the expected responses 'accepted', presumably it was to enhance consistency with the usage as explained in the lesson. 
https://progress.lawlessfrench.com/revision/grammar/when-to-use-le-with-days-of-the-week-weekend