Como é que se diz isto em Inglês (RU)? what’s the difference between these 2 sentences? 1. What day of the week is it? 2. Which day of the week is it?

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@Tinamari based on what is taught to me, “which” is used when you need to identify something specific among a set of things (“which car is yours?” told in front of several cars), while “what” is used to identify the type or kind or quality of a given thing (“what car do you love best?”). so, I’d think that it should be more correct to ask “which day of the week is it?”, seeing that the week days form a set of things, where you have to select from... is there any plausible explanation of what seems to me like an oddity? or it’s simply an exception for this kind of questions?

@Tinamari thank you

@ladybug thank you