Will Byers’ in‑universe birthday in Stranger Things is March 22.

Quick Scoop

  • In Stranger Things season 2, Joyce tells a story that confirms Will Byers was born on March 22.
  • The date later caused a plot hole in season 4, when an episode set on March 22 ignores his birthday , something the Duffer Brothers have openly acknowledged.
  • Despite briefly considering changing it, official franchise posts and coverage still treat March 22 as Will’s canonical birthday.

Many fans now celebrate Will Byers every year on March 22, often pointing out the “forgotten birthday” as one of the show’s most talked‑about continuity goofs.

TL;DR: When you see fans or forums asking “when is Will Byers birthday,” they almost always answer: March 22.

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