My MIL did that but I wouldn't recommend it at all. It is bound to come up sooner or later (even if only through sports).

Scenario 1. Birthday parties. Do you plan on having a birthday party on kids' fake birthday? Would you make him learn his fake birthday only or use both real and adjusted depending on situation?

However, I DO understand your frustration!!! Some SD make that very easy and I have heard of others that simply do NOT take any early entries, even by one day, even with documentation of very advanced intellectual skills, up to par physical skills and social and emotional maturity.

So, while it is hard, at least you have the option! As PP said, it should be easier with a second kid.