Are the days of week and months year abstract nouns?

No, days of the week and months of the year are not abstract nouns. They are concrete nouns.

Here's why:

* Abstract nouns refer to ideas, concepts, qualities, or feelings that cannot be touched or seen. Examples include happiness, love, freedom, justice.

* Concrete nouns refer to things that can be touched, seen, smelled, tasted, or heard. Examples include table, cat, book, music.

While days and months are divisions of time, they are tangible units that we can perceive and measure. We can experience Monday, Tuesday, and so on, and we can point to specific months on a calendar.

Therefore, they fall into the category of concrete nouns.