If this helps in any way...
As of Monday:
Applied: Columbia GSAS, Pitt IBGP, Miami, Loyola Chicago, Case Western, Mount Sinai, Thomas Jefferson, NYU Sackler, GWU, Northwestern DGP, BU PiBS.
**Interviewing
February 17th - 19th and yeah IBGP. It might be slightly dependent on whom you mentioned in you application and their availability. If you mentioned a specific PI, they likely put you on a weekend that that PI would be around for.