From a spiritual point of view, I think its good to baptize infants asap after being born.
They have just transitioned into the world and need all the help they can get staying healthy and safe.
It obviously is good sense to physically wash their physical body shortly after birth.
So, I bet the same is also true for their spiritual body, too, which is what baptism is for, right?
Once theyre up and running, they can take care of it themselves.
But until then and after then, I figure its always better safe than sorry, especially with all things supernatural!
This is my belief as well. I go further into it upthread.
While physically washing is good, the Catholic fantasy that the very act of baptism (ex opere operato) an infant, who cannot obey the stated requirements for baptism, (Acts 2:38; 8:36,37) is born again, means they are henceforth treated as Christians and never challenged to to come to the Lord Jesus as contrite, damned + destitute sinners, and trust Him to save them by His blood-expense and righteousness, not at all by their merit or the power of the church and a postmortem purgatorial work.
And thus most Caths have no conscious "day of salvation," and testimony of manifest transformative regeneration, and yet expect to see Heaven (usually via Purgatory) - to their eternal horror. .