Every team I join has the same superstition: nobody deploys on Friday. But when you trace the fear, it is never the deploy itself. It is the rollback. If rolling back takes forty minutes of manual steps, of course you fear it. Our pipeline runs the full test suite in parallel environments, deploys to a shadow cluster first, and swaps traffic only when health checks pass. Rollback is a single command that takes ninety seconds. Once rollback is trivial, Friday stops being scary. Fear in engineering is almost always a missing safety net. Build the net, not the rule.