They literally do not look Henry Selick-ish at all, but oh well. I tried. I finished this in time for it to be my Christmas special for DeviantArt. 

Bertha Day is the leader of birthdays. "Day" is her middle name, and she has no last name. She resides in the colorful and upbeat Birthday Land in a palace made entirely out of birthday sweets. Where she lives, it's an endless party, and that's because people are born every day. They're festive enough to rival Christmas Town, but Bertha and Sandy are generally on good terms with each other. Bertha is noted for her ability to celebrate for long periods of time without getting tired, but even she gets exhausted. Mostly, she's easily excited, and she's a generous person as well. She'd climb dangerous mountains and brave booby-trapped hallways just to find someone the perfect birthday present. She has many party-planning talents, including baking huge cakes and replicating anything you can think of with balloons (not just animals). She has a pet balloon cat named Peep, the Zero to her Jack. The door to Birthday Land is a triple-layer cake with lots of bright candles at the top. Her skin is made out of cake batter, and her hair is made out of chocolate frosting.

The Tooth Fairy lives over in Tooth Town, the door to which is quite obviously a tooth. Like Bertha, she operates daily because of the countless amount of people who lose a tooth every day. She can't go everywhere in the world, so her trusty mouse pals go to some places for her. She is smart with both her time and her money. Some of the dental denizens of Tooth Town say she's a little TOO smart with them. She isn't one to mess around, especially if she notices that someone hasn't been flossing. She is highly skilled in all levels of dentistry. She does remember to unwind once in a while, so you can find her relaxing and eating candy on break.

Sparky is the explosive leader of New Years- both figuratively and literally, as he's a humanoid firework. Sparky is extremely welcoming of new things- new music, new inventions, new cooking trends, new anything, although he knows which new stuff to allow and which new stuff needs to go. He's also a spirited performer, usually entertaining the citizens of New Year City in his humongous dome. The door to New Year City is a black backdrop with three colorful fireworks of different colors and sizes on it. Being the exuberant guy he is, Sparky and his friends host wild parties that last all night to ring in the new year. Sparky tries to stick to the resolutions he makes every year, but he can never seem to stick to them. He is addicted to bean dip.

Shine is a best friend of Sparky's, and she is a being of light. Kind and understanding, she shines some of her light on other people when they need it. She's very stylish and talented. She adds a ton of dramatic flare to the festivities, and she's better at sticking to her resolutions than Sparky. He was once in love with her, but it faded because she only saw him as a friend. 

DJ Flare is Sparky's other best friend. He has a cool and laid-back image with that mask of his, but he's got a lot going on deep down. He's praised for taking rave music where it's never been before, dropping only the most creative and lively beats for the people's entertainment (and his). He only speaks Techno, which is beatboxing and making drum noises as a spoken language. He references famous masked artists like Marshmello, deadmau5, and Daft Punk (RIP). 

Mother Nature is Bertha's mother and the leader of Earth Day Town. There, she keeps track of all of the environmental conditions of the world. She has a tender heart and nurtures her land, but she wishes that people would take more action to fix their environmental problems. She still keeps in mind that not everyone is able to do something about it. Her long, earthy garment springs with multitudinous life forms depending on her mood. The door to Earth Day Town is a spherical planet Earth with white clouds floating around it. Mother Nature wears a pink carnation that Bertha gave her on the top of her garment. Her skin is made of stone.

Father Time is Bertha's father, and he watches over time itself in Time Town, the door to it being a grandfather clock. He is very wise, knowing many things about life and how it works. He isn't a festive person in contrast to his daughter, but now that all the holidays know each other thanks to Jack and Sandy, he pops in to regulate problems between the holiday leaders. His skin is made out of the wood of a clock's frame. To keep track of time, he carries around a pocket watch that Bertha gave him. The reason Bertha is his and Mother Nature's daughter is because your birthday is the anniversary of the day you were given life as one of Earth's creatures and everything in time began for you. 

Volt is the lightning witch of Halloween Town and the mother of Shock. In my headcanon, the trick-or-treaters are the children of the monsters they dress up as. She can magically manipulate electricity and create lightning. Volt is an eccentric woman who has drastically different interests than her fellow witches, having different tastes in fashion and music, as well as being quite mischievous. She had an affair with a strange wizard named Winkles, who died of natural causes years after Shock's birth. Volt went missing when Shock was a younger child, and she's been on the Wall of Lost Ghouls for a long time. Many of the monsters in Halloween Town feared the worst, but they're still trying to locate her. Shock has tried looking for her with no avail before meeting Lock, Barrel and Oogie Boogie. Nowadays, though, she doesn't really care if Volt comes back or not.

Perry is a gremlin man who is known for his uneven hair and for having been an experienced sea captain. He pilots all sorts of transport within Halloween Town, from boats to trains to trolleys. He is tall, smart, creative and relaxed, a sharp opposite of the murderous, destructive kind of gremlin. He always knows where to go in an hour of need. After the Christmas calamity, Perry met, got to know, and eventually started going out with the Mayor. Perry is transmasc.

And that's all of them.