If last year's dates are any guide, here are a summary of last year (
source):
School, Date interviews were first offered
September
Rochester (9/27)
SUNY Stony Brook (9/29)
U of Michigan (9/30)
October
Southern Illinois University (10/4)
Grand Rapids (10/4)
Georgetown (10/5)
Indiana State University (10/6)
Medical University of SC (10/6)
TriHealth (Good Samaritan Hospital) Program (10/7)
Mayo Clinic (10/7)
UPMC (10/10)
Penn State Hershey (10/12)
Cleveland Clinic (10/13)
Stanford University (10/13)
Yale (10/17)
Dartmouth (10/17)
University of Buffalo (10/17)
University of Wisconsin (10/20)
University of South Florida (10/25)
U of Cincinnati (10/27)
Mt. Sinai (10/28)
University of Massachusetts (10/31)
November
University of Arkansas (11/2)
University of Washington (11/4)
Methodist (11/8)
Allegheny General Hospital (11/9)
Lenox Hill (11/21)
Wash U (11/21) (program opened mid-season)
December
Northwestern (12/12)
Obviously not all the programs are here, but invites started going out no later than those dates last year.