Have you landed yet? How come you can landed on Jan 2005 again?
If you are going to land earlier the next year. The school which your daughter is eligible depends on where you live. In general, the school where you live is obliged to accept those children who are satisfied with the criteria. However, should the school be full, they will refer you to another school.
In addition, you will never know the "studying atmosphere" before you land here, since there could be very different answer for everyone. Basically, the public or Catholic elementary school in Calgary seems to have them in common, from my point of view.