All year round

[lilyyang]

It can be used all year round because it has a special roof that closes when the weather is bad.

Question: What does “round” mean in the sentence?
All year round and all year are not the same?

Thank you!!!

[LILingquist]

Yup. Same thing. You can say all year or year round. All year round is a little redundant, but still acceptable.