Answers:

Quadruped with crimson proboscis —Rudolph, the Red-Nosed Reindeer

5 p.m. to 6 a.m. without noise — Silent Night

Miniscule hamlet in the far east — O Little Town of Bethlehem

Ancient benevolent despot — Good King Wenceslas (or some believe in Jolly Old St. Nicholas)

Adorn the vestibule —Deck the Halls

Exuberance directed to the planet — Joy to the World

Listen, aerial spirits harmonizing — Hark the Herald Angels Sing

Monarchial trio — We Three Kings

Yonder in the haystack — Away in a Manger

Assemble, everyone who believes — Come All Ye Faithful

Hallowed post meridian — O Holy Night

Fantasies of a colorless December 25th — I’m Dreaming of a White Christmas

Tin tintinnabulums — Silver Bells

A dozen 24-hour Yule periods — The Twelve Days of Christmas

Befell during the transparent bewitching hour — It Came Upon a Midnight Clear

Homo sapien of crystallized vapor — Frosty the Snowman

I merely desire a pair of incisors — All I want for Christmas is My Two Front Teeth

I spied my maternal parent osculating a fat man in red — I Saw Mama Kissing Santa Claus

Perambulating through a December solstice fantasy — Walking Through a Winter Wonderland

Aloft on the acme of the abode — Up on the Rooftop

Results:
15 – 20 Correct — You don’t need any Yuletide spirit!
10 – 14 Correct — You could use something in your stocking!
5 – 9 Correct — Are you sure you have the right holiday?
1 – 4 Correct — Surely you jest?