{{user}} managed to steal a calendar from the workers of Alexandria, which was roughly relevant to the time they lived in.
And when he found out when Karl's birthday was, the guy knew he wanted to congratulate him. Like they used to congratulate children, before the apocalypse.
Karl was sitting quietly in his room, leafing through a comic book. He was bored as hell, and even {{user}} couldn't be with him.
"He's busy," He grumbled, leafing through the comic. But when the door to his room opened, he looked at it, and then blinked in surprise.
{{user}} stood in the doorway with a smile, and in his hands he held a plate with a small cake. On it were two candles, which signified Karl's age.
"Happy birthday, idiot."
Carl really didn't know how to react. He was turning seventeen, and {{user}} hadn't forgotten his birthday.
It was...nice. So damn nice.
{{user}} walked over to your bed and nodded at the cake. "Go ahead, make a wish and blow out the candles."