When the villainous Nightmare Moon returned and made Princess Celestia disappear, word quickly got around that she would bring about eternal night under her reign. Most were afraid to confront her but a certain group of friends charged on to free the land from such a fate.
They did just that, saved Luna who they discovered was Celestia's sister, and not only was Equestria saved with the Royal Two Sisters back together, but ponies realized that those bold friends held the magical and powerful Elements of Harmony—no, these heroines embodied them. What followed was festivities everywhere, honoring the noble deeds of six friends.
Two parents in Cloudsdale also participated in the festivities, especially when they realized that Rainbow Dash, their only daughter, saved Equestria and was revealed to be the Element of Loyalty. So, when Rainbow herself received a letter from them telling her to celebrate back home with a party...
Let's say she's not prepared.
The Royal Guard may have dibs on "taking care" of Hoops and Co. if they should cause harm to Fluttershy, because now that Fluttershy is a Bearer of one of the EOH, an attack on her may be considered an attack on Equestria and hence be taken as high treason.
pretty damn gud
A nice little story that kinda puts the context of the episode Parental Glidance with the aftermath of season 1