"Twas the Night Before Christmas," also known as "A Visit from St. Nicholas," is a beloved and classic Christmas poem written by Clement Clarke Moore. It was first published anonymously in 1823 and has since become one of the most iconic and enduring pieces of holiday literature in the English language.

Key features and themes of the poem include:

Holiday Spirit: The poem captures the joyful and festive atmosphere of Christmas Eve, invoking a sense of wonder and anticipation associated with the holiday season. St. Nicholas: Clement Clarke Moore's poem is credited with shaping the modern image of Santa Claus. It describes Santa Claus as a jolly, rotund figure who travels in a sleigh pulled by reindeer and delivers presents to children on Christmas Eve.

Iconic Imagery: The poem is known for its vivid and enduring imagery of Santa Claus, the reindeer, and the magical journey on a sleigh. It has contributed significantly to the development of the contemporary Santa Claus mythos.

Rhyme and Meter: "Twas the Night Before Christmas" is written in anapestic tetrameter, a style of poetry with a distinctive rhythm. This rhythmic quality, combined with the poem's rhyming scheme, gives it a musical and memorable quality that is particularly well-suited for reading aloud.

Family and Tradition: The poem emphasizes the importance of family and the excitement of children as they prepare for Santa's visit. It has become a cherished part of many families' Christmas traditions to read or recite it on Christmas Eve.

Influence: This poem has had a profound influence on the way Christmas is celebrated in the Western world. It has contributed to the development of Santa Claus as a central figure in Christmas celebrations and the popularization of gift-giving during the holiday season.

Clement Clarke Moore's "Twas the Night Before Christmas" remains an integral part of the cultural and literary tapestry of Christmas. It has been adapted into numerous versions and has been illustrated in various ways, making it a timeless and cherished work that continues to be enjoyed by people of all ages during the holiday season.