Well, actually yesterday, but since it is something I like to commorate each year, and since I forgot yesterday, I'm celebrating today. Keats' poem is, in my opinion, one of the great ones.
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St. Agnes' Eve—Ah, bitter chill it was!
The owl, for all his feathers, was a-cold;
The hare limp'd trembling through the frozen grass,
And silent was the flock in woolly fold:
Numb were the Beadsman's fingers, while he told
His rosary, and while his frosted breath,
Like pious incense from a censer old,
Seem'd taking flight for heaven, without a death,
Past the sweet Virgin's picture, while his prayer he saith.
His prayer he saith, this patient, holy man;
Then takes his lamp, and riseth from his knees,
And back returneth, meagre, barefoot, wan,
Along the chapel aisle by slow degrees:
The sculptur'd dead, on each side, seem to freeze,
Emprison'd in black, purgatorial rails:
Knights, ladies, praying in dumb orat'ries,
He passeth by; and his weak spirit fails
To think how they may ache in icy hoods and mails.