Don't know what it's like for others out there, but notice to attend a late Feb interview this late in Jan would be guess and by God for me. It would all hinge on whether I happened to have scored those particular days off.
Maybe they purposely make it hard as part of the test to see how keen you are? I'm sure they wouldn't be happy to learn you'd pulled a sickie to make the interview, as some will have to do if they're that keen to attend.