Had something similar trying to schedule a phone interview. The confirmation email text gave a time 3 hours before the date picker time displayed on their site.

Had something similar trying to schedule a phone interview. The confirmation email text gave a time 3 hours before the date picker time displayed on their site. I spoke to them on the phone to manually schedule me and then we ran into a problem where there were no daily saving time zones so I had to give myself a two hour window to be sure.