@ChemGirl713 don't worry too much! I didn't interview until March, and lots of people were interviewing during the big snow storm in February. However... They only inform you via a single email, and last year multiple interview invite emails just never made it to recipients (including me). So, if February 15th roles around and you've heard nothing at all, it's worth finding someone to check in with, just to make sure you didn't miss an email or something. Honestly, getting info to students is not SU's strong suit! ?