We have baby dedications and the pastor gives a letter to the parents to open with the child on their 16th birthday. Why 16? I don't know.
Age of Accountability?
And what is the biblical warrant for "baby dedication"? Yeah, yeah, Samuel was dedicated. So what?
That is probably the reasoning. I'm not sure you can set an exact age because people mature differently.
And what is the biblical warrant for "baby dedication"?
As a congregation we are praying for the baby that the LORD may bring the baby to a saving FAITH. The biblical warrant is probably as strong as that for infant Baptism.