M1: Release Announcement (11/6/25)
M2: All PRs landed in PyTorch repo / Feature Submission Closed (12/3/25)
M3.1: Release branch cut (12/5/25)
M3.2: Release first RC1 Binary for PyTorch Core (12/8/25)
M3.3: Domain libraries cut RC Branch (12/9/25)
M4: Release branch finalized, Announce final launch date, Feature classifications published (week of 1/9/26) - Final RC is produced.
M4.1: Tutorial drafts submission deadline (1/12/26)
M5: External-Facing Content Finalized (1/16/26)
M6: Release Day (1/21/26)