Dark dress pants, LONG sleeved dress shirt with tie, dress shoes, with socks.
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You can stop at the "Cathedral" on your way home!
I used to mentor inner city youth about how to prepare for a job interview.
I told them to go the day before, and see how the people who worked at the company dressed, then dress like they do.
I told them to be on time, which was a POSSIBILITY, because they would already know where to go.
That would be a mute point here, because no matter what time they arrive, they will still have to wait for the "HR" person to show up!