After an HR screening call, had a series of three interviews at HQ; however, the 4th interviewer had an unexpected trip, so we had to reschedule for a video interview that evening. the HR person told me the day of my onsite interview was 'Formal Friday' (a weird dress up day) and I didn't have to participate but 'it would help.' I put together an interview outfit that tried to make a nod to this, but it threw me! No one I interviewed with was rockin' 'Formal Friday.'