OrangeRiff

This would be fun and really educational, but since discords downfall was covered in S4E2 (in less then 5 minutes) i don't think the creators will work on this.

I think they have either been around since the creation of the land, or been immortalized when they received their "duties". If we believe everything told in the HWE story, then the sisters shouln't have been around unil the 3 tribes came to Equestria, because it is said that the unicorns used to manipulate the sun and the moon. But if that is true, than when were they actually born, when did they inherit their roles, and most importantly, why didn't they live in Canterlot (which was built by the unicorns), why live in their own castle (which shows no sign of anypony else living there besides the two) in the Everfree forrest if they were elected rulers by the tribes? So my oppinion is, that they have been living in that castle long before the tribes arived to Equestria, which would mean, that either the unicorns were fooling everypony else about them raising the sun and moon, or the sisters gained control of the 2 celestial objects after the tribes came in from the north.

I just wrote my oppinion on this in another topic: A: they have been around since the creation of the planet, and done their stuff since, or B: they have inherited the power to spin the planet and make the moon orbit it from some predecessor(s). but I also like the idea of Mycroftxxx, about the "skybox" thingy

I would look at this question from a litle farther away first: We know that Equestria is located on a planet (let's call it E), which does not have a name at this point, but it must be a planet as it has a moon (let's call it M). It is certain that M is an entirely separate celestial body, because Luna was banished there, and in the comics (which are considered canon, as far as I know) the mane 6 go there on an adventure. So if E is a planet, and there is a sun and a moon, then it should be in a solar system. So considering this, the roles of the two sisters shouldn't really be rising and dawning the Sun and the Moon, but instead rotate E, and make M orbit around it, IF E is not the center of it's solar system, which is very unlikely, considerding it's most likely about the size or smaller, than Earth. Now let's just think about what would happen to E, if the sisters wouldn't be there to make it (and M) move around... There would be no life at all. So there are 2 cases for this to work out: A: Celestia and Luna are immortals, and have been around since the creation of E. This would solve a lot of things, wouldn't it? But there would come the question: Where were they during the happenings of Heart's Warming Eve? To be exact, nothing implicates, that the regal sisters were living with the 3 tribes during that time. We know, that originally they were living in a casle in the Everfree Forrest (as per Season 4), as Twilight states that the castle was damaged when the incident with Nightmare Moon occured, from which we can conclude, that the sisters were living there, and not in Canterlot (built later by the unicorns) at and most likely before that time, and Celestia only moved in Canterlot after banishing Luna to the moon. So I think it is safe to conclude, that they were already living in Equestria by the time any other ponies got there. So in this case we can say that maybe they didn't actually have parents at all. B: My other guess would be that their role, of moving celestial stuf around, and maintaining life on the planet, is a heritage. In this case there had to be one or two predecesor(s) [because we know that one pony can manage both the planet and it's moon] to the sisters, who at the end of his/her/their time gave the power to them, so they can maintain things as they are. In this case can we only speak about them having parents, and being born as normal alicorns. (who were still living in equestrian territoy before the arrival of the tribes, but in this case not alone at all...)