Wednesdays Or Wednesday's

Grammar: Wednesday or Wednesday? 3

I know you're not using plurals, but I wanted to make sure there are no special rules for the days of the week.

I always say Wednesday, but my FLVS teacher's page says Monday and Wednesday.

Am I convinced that I am a grammar and that it is okay?

Very! And it should have known better. On alternate days of Wednesday and Monday and Saturday, just add s to make a deposit. Adding s means you are talking about which includes Monday or Wednesday. For example, it is possible that everyone needs to get more sleep on Wednesday's schedule. But unless you deliberately own it, quotes are wrong.

Wednesday is like a day, with only a different name.