Looking at schools in the UK for DD to enter on 13+ on CE or relevant school exam.
Here the whole system is v different with Jan-Dec age and DOB rather than the 31st Aug cut-off the UK has. And it's all pretty fluid on top of that too, so she's currently a grade/year ahead (by age) compared to her peers in British schools.
So, if her 13th birthday is Oct 2014, when would she start at the school for entry at 13+?