Quince's End-of-Year sale has markdowns on over 300 items, but today is the only day to save

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We have tested over 60 individual items from Quince. Some of our favorites (from left to right) are: the Responsible Down Puffer Jacket, the Carry-On Suitcase, and the Leather Flight Jacket.

Sally Kaplan, Gabrielle Chase, Amir Ismael/Business Insider

This year marks the inaugural Quince End-of-Year sale. The deals are live for one day on December 26 — and it's one of the few times a year the...