Sans aus find out about human holidays

(all over the age of 18) (They all can form other ectobodies of the opposite sex) Dream: Tall, male skeleton that wears a yellow hoodie and white pants with yellow eyelights. Yellow ectobody. Yellow tongue. Yellow blush. Swap: Average height, male skeleton. Wears a light blue jacket over a white shirt and black leggings. Blue eyelights and blue Ectobody. Blue tongue. Blue blush. Nightmare: Twin of Dream. Tall, male skeleton. Wears a black Jacket over a green shirt and black jeans. Two green tongues. Green-blue eyelights and ectobody. Green blush. Error: average height, male skeleton. Wears a red shirt, a black jacket, and black shorts. Red Glasses. Yellow and Blue eyelights. Five blue tongues. Blue Ectobody. Yellow blush. Horror: extra tall, chubby, male skeleton. Crack in skull. Red shirt, jean jacket, black sweatpants. Red and black eyelights. Red ectobody. Red tongue. Red blush. Dust: Short, male skeleton. Black crop top, purple hoodie, black leggings. Red and purple/blue eyelights. Purple ectobody. Red and blue tongue. Purple blush. Geno: average height, male skeleton. Grey shirt, white jacket, grey sweatpants. White eyelights. Red ectobody. Red tongue. Red blush. Ink: Short, female skeleton. Orange, cat crop top, tiny yellow skirt. Eyelights change according to emotion. Rainbow ectobody. Rainbow tongue. Rainbow blush. Cross: Tall, female skeleton. Purple crop top, tiny black shorts. Red and white eyelights. Red scar under white eye. Purple ectobody. Purple tongue. Purple blush. Reaper: Extra tall, female skeleton. Navy blue corset top, black skirt. White eyelights. Navy blue Ectobody. Navy blue tongue. Navy blue blush. Killer: Average height, male skeleton. White crop top with black leather jacket, leather shorts. No eyelights. Black tear-like streaks. Red ectobody. Red tongue. Black blush. Fell: average height, female skeleton. Red top, leather jacket, leather shorts. White eyelights. Red ectobody. Red tongue. Yellow blush. Lust: average height, female skeleton. Cyan crop top, purple jacket, pink skirt and white belt. Purple Eyelights. Purple and pink ectobody. Purple tongue. Cyan blush Fresh: Extremely tall, male skeleton. Light purple top, bright blue and green jacket, bright orange shorts, cyan and Pink shoes, red and yellow baseball cap, and black glasses that say words on them occasionally depending on what he's feeling. White and purple Eyelights. Light purple ectobody. Has one rainbow tongue but can summon more. Light purple blush. Epic: Average height, male skeleton. White top, purple and black jacket with hood, black pants, purple shoes. White and dark purple Eyelights. Purple scar down purple eye. Purple ectobody. Purple tongue. Purple blush. Color: Average height, male skeleton. Grey top, blue jacket, black pants, Blue shoes. Colorful flames come out of a hole in his skull that change colors based on his feelings. White eyelights. Rainbow ectobody. Light blue tongue. Rainbow blush.

They are all currently at Nightmare's mansion