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First Day Covers are specially designed and prepared envelopes, typically featuring commemorative stamps, which are cancelled on the first day they become available to the public. They serve as an attractive collectible that preserves the pristine condition of newly issued stamps while showcasing unique designs related to their subject matter. Often adorned with illustrations, historical scenes or thematic elements, these covers offer a tangible link to the history and culture of their time, making them popular among philatelists and collectors alike.