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Annual observance

Moldy Cheese Day

October 9 Food / Dessert Updated 2025-12-18

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Overview

Moldy Cheese Day, celebrated annually on October 9th, is an unofficial holiday dedicated to appreciating and enjoying the distinctive flavors and textures of cheeses ripened with beneficial molds. From the pungent notes of blue cheeses to the creamy, earthy profiles of Brie and Camembert, this day encourages gourmands and casual enthusiasts alike to explore the diverse world of these unique dairy products, which owe their characteristic qualities to specific fungal cultures.

Observed each year on October 9, Moldy Cheese Day invites people to pause, share the story, and bring a little themed joy to their day.

Why it matters: Moldy Cheese Day, observed on October 9, celebrates the unique flavors and textures that mold-ripened cheeses offer, highlighting the artistry behind their production. This day invites food enthusiasts to explore the complex profiles of cheeses like blue, Brie, and Camembert, deepening their appreciation for these culinary delights.

Origin and story

The blue veins in cheeses like Roquefort, Gorgonzola, and Stilton are caused by the *Penicillium roqueforti* mold.

The white rind on cheeses such as Brie and Camembert is formed by *Penicillium camemberti* or *Penicillium candidum*, which contributes to their creamy texture and earthy aroma.

Quick facts

  • DateOctober 9
  • TypeFood / Dessert
  • Great forFoodies, Chocolate lovers, Home bakers

Also on this date

Ways to celebrate

  • Host a tasting plate with sweet and savory pairings.
  • Moldy Cheese Day lands on October 9 — host a quick nod with Foodies, Chocolate lovers and snap a photo.
  • Plan a 10-minute activity that fits the food / dessert vibe and make it a mini tradition.
  • Share a recipe photo, tag friends, and swap your favorite topping ideas.
  • Bring Moldy Cheese Day to work or school with a short shout-out in a meeting or group chat.

Fun facts

  • The blue veins in cheeses like Roquefort, Gorgonzola, and Stilton are caused by the *Penicillium roqueforti* mold.
  • The white rind on cheeses such as Brie and Camembert is formed by *Penicillium camemberti* or *Penicillium candidum*, which contributes to their creamy texture and earthy aroma.
  • The molds used in cheese production are specially cultivated and are safe to consume, playing a crucial role in the cheese's aging, flavor development, and texture.

Sources and attribution

Source not provided.

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FAQ

When is Moldy Cheese Day?
It is observed on October 9 each year.
What is Moldy Cheese Day?
Moldy Cheese Day, celebrated annually on October 9th, is an unofficial holiday dedicated to appreciating and enjoying the distinctive flavors and textures of cheeses ripened with beneficial molds. From the pungent notes of blue cheeses to the creamy, earthy profiles of Brie and Camembert, this day encourages gourmands and casual enthusiasts alike to explore the diverse world of these unique dairy products, which owe their characteristic qualities to specific fungal cultures.
How do people celebrate Moldy Cheese Day?
Host a tasting plate with sweet and savory pairings.

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