GCP 127 days
GCP App Engine Go 1.21 (go121) end of life (deprecated)
By March 3, 2027: move to go124+. After that, Go 1.21 (go121) on GCP App Engine is still yours to run; it just isn't anyone's job to patch. Source: cloud.google.com, checked 2026-10-15.
- What's retiring
- Go 1.21 (go121) deprecated (GCP App Engine)
- When
- March 3, 2027
- Days left
- 127 days left, as of 2026-10-27.
- What happens
- Deprecated runtime.
- What to do
- Move to go124+.
- Kind of change
- Runtime end of life
- Official source
- cloud.google.com ↗ (last checked 2026-10-15)
Get a heads-up before this deadline hits.
A free weekly email of upcoming AWS, Azure and GCP deadlines, with what to do about each. Unsubscribe anytime.
Providers move dates. Check the official source before you plan a migration around this one.