When I had heard about the shift in the birthday cutoff date for new Kindergartners, I have to admit I freaked out a little. Not for #1 daughter because her birthday is in the early part of the year, but for #2 son, I was getting a little freaked out. I had always envisioned both kids going to school together and so the notion that #2 would be held back a whole year because he had the misfortune to be born after the cut off date was too much for me to handle. So I actively started looking at private schools for a while even though I had always envisioned both kids going to public schools.
Then I talked to some folks including an admissions director for a private school who pointed out that most private schools have similar and often more strict cut off dates for Kindergarten entry. Then I calmed down a little more and found out that there would be slowly rolling back that date so, for example this year the birthday cut off is December 2. For 2012-2012 entry, the birthday cutoff is November 1. For 2013-2014 the birthday cutoff is October 1, and the new rule will be fully implemented in 2014-2015 when the cutoff will be September 1.