IVR say it's not working hour, but it's incorrect

I am using Zoom Phone.

There is a site in Auto Recepctions, I double check that business hours are correct.

Business hours is 9:30 AM ~ 18:00.

But when I call it at 17:30, IVR say office was closed.

I did double check Time Zone in Zoom Admin, it's correct.

What can I do or any thing I must check again ?

Thank you.