Here's why:
* Length: Epic poems are typically very long, telling grand tales over thousands of lines. "Twas the Night Before Christmas" is a short poem, only about 100 lines long.
* Scope: Epic poems often deal with themes of national or universal importance, featuring heroic figures and grand adventures. "Twas the Night Before Christmas" is a cozy and intimate poem, focused on a single night and the simple joy of Christmas.
* Style: Epic poems often use elevated language, formal structure, and complex imagery. "Twas the Night Before Christmas" is written in a simple and straightforward style, with a playful and whimsical tone.
While "Twas the Night Before Christmas" is a beloved and enduring poem, it doesn't meet the criteria of an epic poem. It's more accurately categorized as a narrative poem, telling a story in a lyrical and evocative way.