In the books, Harry doesn't start receiving letters inviting him to Hogwarts until the summer before he is to begin attending. But while he might have been raised by Muggles, he was still considered a halfblood wizard and probably did not receive the same consideration as true Muggleborns do.

What I wonder is, when do you think British Muggleborns would have their letters sent to them? I have seen stories where students get their letters at the same time as everyone else, where they receive it on their eleventh birthdays, and some where they receive their letters up to a year and a half or two years before they are to begin attending.

What are the thoughts and opinions of this subject from the community?