Although Curumë thinks every day spent with Vayu is a special day, for this specific date, he wants to make his partner feel loved and cherished, more so even than usual. He slips out of bed early before sunrise, taking over cleaning and household duty so Vayu can stay in bed for longer. Then, when he finally wakes, Curumë will greet him with a kiss on the forehead. Sunlight is tickling both of their faces, as he offers Vayu a warm smile, presenting him with a healthy breakfast in bed.
Spending some more time cuddling Vayu, he lets him know that he has taken care of his chores and that they can spend the day any way Vayu likes, but will suggest a walk in the forest. In the evening he takes Vayu to their favourite clearing, bringing a bottle of wine, sweets and a special treat from Vayu's home country (both, which he has stolen or smuggled the days before). Their dinner is simple, something Curumë could get premade from the town. But it is hearty and equals comfort food.
As they sit in the clearing, cuddling, and maybe drinking a bit of the wine, he will look into Vayu's eyes and tell him that they reflect the night sky before he kisses him and reminds him how much he loves him and that despite the night sky full of stars, Vayu is his only star in the dark. He will sit and cuddle with Vayu as long as likes, holding him close and enjoying the quiet of the evening with him.
Of course, Vayu tries to climb out of bed shortly after waking up as a first instinct. It takes a bit for him to settle back down and enjoy a lazy morning, content in the knowledge that Curumë had taken care of his morning chores.
He wasn't sure how to spend an entire day now that he had no work to do, at least not on such a short notice -- but a walk in the forest was probably going to be his final choice anyways.
In the evening, they both drink the wine and enjoy their picnic under the stars (and Vayu sighs when he sees it and the sweets and treats Curumë brought, because he knew full well they were stolen, not that it stops either of them).
Vayu leans his head against Curumë's shoulder, and looks up past the canopy. His mind wanders back to the first night they spent in this very clearing, looking up at the stars together on a night where neither of them could sleep. Staying there, despite Vayu's initial plan, til sunrise. He's a bit tempted to do it all again, to hoard all of Curumë's affection til the stars went out.
"Thank you," he murmurs, as he closes his eyes, still leaning on him.