The headline refers to kindergarten but that's not a big deal, kindergarten years are optional anyway so parents can do what they want.  The interesting point is that grade 1 is mandatory for 6 year-olds but those born after school starts in the fall can delay grade 1 until the year they turn 7, is what I get from this.  Can't see many doing it, most parents abhor the idea that their kid is being left out or "left behind", but some may be interested to know of this option.  The education industry likes to sign up their "clients" asap so I'm not surprised this option previously has not been widely broadcast.