One must consider the cutoff start date for Kindergarten in their state. I am totally against starting children early. I have experienced this first hand with my now 2 of 3 grown children. They were fall birthdays and the cutoff in Michigan was December 1. A well-known psychologist and friend said to me, "your children are smart, focused, self-regulated, and can interact well, but…give them emotional development time. It is around 3rd grade when we see the early starters, or/and pushed children start to falter, especially boys. " As an educator, I have shared this advice repeatedly. Always, yes always, parents have come back and thanked me. By the way, we did receive some static by NOT sending them to school by educated family members. We have NO regrets about enjoying their lives as preschoolers a bit longer.
As a now college professor, I again see those children who were early kindergarten starters often falter in their first year of college. I ask all my students when their birthdays are and I am always shocked how the younger college students struggle adjusting. AGAIN-emotional development comes into play. David Elkind's views in his book the Hurried Child offers a variety of perspectives…about NOT sending children early to kindergarten.