I applied last year, and my application went out in the middle of September. I received an email invite for an interview in October, but I got it only about a week before the day of the interview. It may not be that way for you this time, but I would just make sure that you are prepared to make the trip to D.C. at any time. I hope everything goes well for you!
I applied really late to Howard last year (end of Jan) and didn't get called in for an interview until end of April! Also, I kept calling to check on the status of my application, and they kept saying the app fee hasnt been processed. It took them almost a month to process the fee! I went to Howard undergrad (and loved it), but I'm staying clear of Howard for dental school. They seem to be disorganized. Good luck!
GPA: Good
DAT: retake in 3 weeks
Applied: Michigan, MUSC, Penn
Still Applying to: NYU, Columbia, Maryland, USC (maybe?)