For most parents, enrolling their little one in nursery marks the first big step into the world of schooling  with a mix of pride, excitement, and a little anxiety. One of the most confusing parts of this process is figuring out the nursery admission age criteria . Is it the date as of March 31, or Jan 1? And even, finally, what does “no older than three years old as of May 1” actually mean?  How old should your child be? What’s the difference between pre-nursery and nursery?