Author's Notes: I've only recently started reading the manga, so I hope this isn't totally OOC. Haa, and I don't think they had sparklers back then, so work with me.. Oh, and Svalbard is an OC, in case you wondered..
Welp, here goes nothin'~~
Happy Birthday, Amerika
A blaze of sparks filled the night air, tremors reverberating through the ground. Fading colors danced off the face of the still water as an uproar of cheering and laughter swarmed in the distance. And it was there, perched on the dock's railing, that America sat, eyes wide, lips parted in an exuberant smile. In his right hand, he held a miniature flag, and in the other, a noisemaker, doted in patriotism. He suddenly began waving them about sporadically, pure excitement filling his eyes.
"Okay, everyone," he shouted, spinning around to look behind him, "here comes the grand fin...al...e," he paused, a tear pricking his eye. "But-But I...invited everyone. How could they have forgotten?"
A light pattering sounded across the planks, but he paid it no mind. Heaving a sigh, he hunched forward, leaning into the railing. "Oh well, perhaps next-"
"Ameeerikaaa!" Having no time to look, he was suddenly pulled into a frenzied embrace. "I've missed you so!"
"Oh, Svalbard, it's you," he smiled, relieved to see her. Lately, he'd come to rely heavily on her, as well as her elder brother; they seemed the only ones to always pull through, no matter what the circumstances may be[1].
"I told you I'd show," she grinned, planting a benevolent kiss upon his cheek and retrieving two unlit sparklers from her back pocket. "Happy birthday, min kjære[2] Amerika."
References:
[1] Important to the Allied war efforts was the Norwegian Merchant Marine fleet, which took part in every war operation from the evacuation of Dunkirk to the Normandy landings. (Note: Svalbard is a cluster of islands which make up the northermost part of Norway.)
[2] Norwegian, meaning "my dear."