Diluc wouldn't throw a big party, though Crepus used to throw big parties all the time, so it feels weird for him to just Not celebrate. So, to still celebrate, he just makes a small party and inviting those close to his heart.

A nice amount of hearty and love-filled foods, a cozy atmosphere. Enough chairs for everyone and food catering to everyone as he knows and remembers... He might even drink a little just for the occasion, but with his wine of choice which is premiun but not a strong bottle.

But to me specifically (or. Childe.), he'd pay extra attention with me after the party is done. Just gentle cuddling and professing love all over again, even though it's with some grumbling and calling me a stupid boy (usually after I profess my love). We just spend time together, comfortable in each other's company. Happy New Years!! To a more Chilucful year!!