Audrey adore le mercredi/les mercredis

Hi David and Alan,

Although in some cases you can say 'les + jour de la semaine', it will be in cases like the ones you mention, to like, to hate. If you use préférer, it will be for instance, 

Je préfère le jeudi au lundi. (I prefer Thursdays to Mondays.)

The point of the lesson was to avoid classic mistakes for On + Day of the week and to encourage students to use, le mercredi, le weekend etc...

To use both in the lesson would serve to confuse rather than to help.

You will find exceptions to all the rules you encounter and this is one of them.

Hope this helps!

Bonjour à tous !

From my native point of view, using les is not really correct when making a general statement. 
@David, following your remark on Google occurrences (note that the ratio was 1 to 4 in favour of le), I had a look at cases with les, and they're mostly different contexts such as:

- using either "ces mercredis-là",
complements "les mercredis où je reste à la maison",
or possessive adjectives "nos mercredis à la plage".
In such cases, you will use the plural as you're referring to a certain number of Wednesdays but not *all* of them in a general manner.

As for the song, I listened to it and apart from the title phrase, she actually uses the singular in the lyrics "le dimanche", confirming my impression of poetic license here :)

I hope that's helpful!
À bientôt !