The 100 moons thing has always bugged me. I don't believe it's been over eight years since Twilight moved to Ponyville and Applebloom is eight years older.

So I would guess that maybe they're counting four moons per month:  Making it just over two years.

When it aired I was looking carefully at the photos for any sign of "the parents". No Bright Mac and Pear Butter. But it was sad and nice how the shooting stars represented them.

Fruit bats fly in impressive rainbow formation.