This is how Hearth's Warming Decoration goes in A Hearth's Warming Tail.
[We view ponies and Autobots decorating Ponyville and Twilight's Castle for Hearth's Warming]
Ponies and Autobots: Ponies' voices fill the night~
[We see Optimus Prime helping Princess Celestia]
Optimus Prime: Hello, your majesty.
Princess Celestia: Optimus.
Optimus Prime: This is my first time celebrating Hearth's Warming with you and your subjects.
Princess Celestia: Yes. And it is my first time celebrating it with you.
[We see Princess Luna helping Twilight]
Twilight Sparkle: It's so nice that the Autobots could join us for Hearth's Warming.
Princess Luna: Indeed.
Twilight Sparkle: We have them join us more often.
Princess Luna: I quite agree.
Starlight Glimmer: Knock Out, why aren't you joining in?
Knock Out: I was thinking I might just skip it.
Starlight Glimmer: [gasps] Skip Hearth's Warming Eve?!
Knock Out: I just fail to see how important Hearth's Warming Eve is. I just find it all a little silly. It's mostly a day dedicated to presents and candy, isn't it?
Starlight Glimmer: And why would you deny yourself presents and candy? That's crazy talk! Hearth's Warming is about more than presents and candy. It's a time to spend with friends and family when we celebrate a very important day in Equestria's history.
Knock Out: I think to most ponies and Cybertronians, it's just an excuse for silly songs and fun, not a day to remember some old story.
[Starlight then gets an idea]
Starlight Glimmer: Maybe you just haven't heard the right Hearth's Warming Eve story yet!
Knock Out: Earth Ponies, Pegasi, and Unicorns sing songs around a hearth to fight back an eternal winter caused by the mythical windigos? Ha! Every foal and filly knows that story.
Starlight Glimmer: Not that one. My favorite holiday story, "A Hearth's Warming Tale"!
Knock Out: What are you talking about?
Starlight Glimmer: Come with me and I'll show you.
Knock Out: Okay.