After applying on the company website, I promptly received an e-mail invitation to select a time to have a phone interview. Since the time times available were only evening, I selected 5:30p MST (the scheduling system specifically said all times were in MST, even though I am applying in Arizona where it is currently PST until November.) At 5:30 MST, I did not receive the interview call, so after 20 minutes I called their HR team to follow up. I was told that my recruiters interview was scheduled for 8:30p ET(6:30MST), even though both the E-mail confirmation and their HR recruiting website still said 5:30 MST. I shrugged it off assuming their scheduling platform was confused by Arizona time being currently aligned with PST instead of MST due to DLS time, and decided to wait until 8:30 ET. After waiting until 8:30 ET, I again did not receive a call or voicemail from the recruiter. When I called the HR recruiting office again at 8:50 ET, their office was closed. My best guess is there is a technical error in their scheduling system for Arizona because it does not adhere to daylight savings time, but either way the rep should have know that the department was closed at the supposed 8:30 ET interview slot.