They’re expected to be back at McDonald’s on February 17, 2026 in the U.S., with the usual limited-time run through the St. Patrick’s Day season (roughly until late March, while supplies last).

Quick Scoop

  • For 2026, food news outlets report Shamrock Shakes will roll out nationally starting Tuesday, February 17.
  • In past years, they’ve typically appeared in February and stuck around through mid‑ to late‑March , often labeled “for a limited time” and “while supplies last.”
  • Exact dates and availability can vary a bit by location and franchise , so some stores may get them slightly earlier or later.

Recent year timing (context)

  • 2024: McDonald’s officially brought them back on February 5.
  • 2025: They were back again in early February, with many locations starting around February 10.

So for this year, plan on grabbing one starting February 17, and don’t wait too long—once the promo window and the mint syrup run out, they disappear again until next year.

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