Will Byers disappears on the night of November 6, 1983, in the first episode of Stranger Things , titled “The Vanishing of Will Byers.”

In‑story disappearance

  • Will goes missing while riding his bike home from a Dungeons & Dragons game in Hawkins, Indiana, on November 6, 1983.
  • He is taken by a creature from the Upside Down near the area the kids nickname “Mirkwood,” leading everyone to believe he has simply vanished.

Why the date matters

  • November 6, 1983, is treated as a key lore date in the series and is directly referenced in official materials and timelines.
  • Fans celebrate “Stranger Things Day” every year on November 6 to mark the in‑universe anniversary of Will Byers’ disappearance.

Quick recap of events after

  • In the days following his disappearance, Joyce starts receiving strange signs from Will, especially through flickering lights in their house.
  • By mid‑November 1983, Joyce and Hopper manage to rescue Will from the Upside Down, bringing him back to Hawkins, though he remains connected to that dimension afterward.

Information gathered from public forums or data available on the internet and portrayed here.