Recently, the NRMP hosted a webinar called, "Introduction to the 2027 Main Residency Match®." There are two categories of take away points:
September 15 — Applicant and medical school registration opens
September 23 — Applications available via ERAS and ResidencyCAS (OB/GYN and Emergency Medicine use ResidencyCAS)
February 1 — Ranking opens
March 3 — Rank Order List certification deadline
March 15–19 — Match Week and SOAP
March 19 — Match Day
2) Two policies particularly notable for applicants:
First, residency programs can't extend more invitations than available slots and must give applicants at least 48 hours to respond.
Second, programs can't ask applicants about their ranking plans, request preference signals, or solicit commitments to rank.
Here's the webinar link.