Even though mail is not delivered on Sunday, is the Post Office still open?

Question

Even though mail is not delivered on Sunday, is the Post Office still open?

Answer 1

The typical post office is open to allow access to boxes, but there is no window service.

Answer 2

not for business but you can drop off letters and check your p.o. box if u have one

Answer 3

It is open on Sunday in Loma Linda, Ca.  The town is mostly Seventh Day Adventists, so it is closed on Saturday instead.

Answer 4

No not in my area, Post Offices are locked over the weekend.  There are outside boxes that you can put mail to send out.