Beer Info FAQ

Does Blue Moon Beer Have an Expiration Date?

Blue Moon beer, a popular Belgian-style witbier brewed by the Molson Coors Beverage Company, is known for its refreshing taste, cloudy appearance, and the signature orange slice garnish. But does this beloved beer have an expiration date? In short, yes. Like most beers, Blue Moon has a shelf life that can be influenced by several factors, including storage conditions, ingredients, and the brewing process. In this article, we'll delve into these factors and provide tips on how to store your Blue Moon beer to maintain its optimal freshness.

Factors Affecting Beer Shelf Life


The ingredients used in brewing Blue Moon beer, such as malted barley, wheat, hops, yeast, and water, can all contribute to its shelf life. Hops, for example, have natural preservative properties that can help prolong the freshness of beer. However, the aroma and flavor of hops can diminish over time, affecting the overall taste of the beer.

Brewing Process

The brewing process also plays a crucial role in determining the shelf life of beer. Blue Moon is brewed using a traditional Belgian method, which involves adding a variety of spices and flavorings, such as coriander and orange peel. These additions can alter the beer's stability and shelf life, making it more susceptible to spoilage.


Blue Moon beer is pasteurized, a process that involves heating the beer to a specific temperature to kill off any potential spoilage-causing microorganisms. Pasteurization can help extend the beer's shelf life, but it can also affect the taste and aroma of the beer.


The packaging of Blue Moon beer is designed to protect the contents from external factors, such as light and oxygen, which can degrade the beer's quality over time. The beer is typically packaged in brown glass bottles or aluminum cans, both of which provide a barrier against light and oxygen exposure.

Determining the Expiration Date of Blue Moon Beer

To determine the expiration date of a Blue Moon beer, look for the "best by" or "best before" date printed on the packaging. This date is usually found on the bottle's neck or the bottom of the can. The brewery recommends consuming the beer within 180 days of this date for the best taste and quality.

It's worth noting that the "best by" date is not a hard expiration date, and the beer may still be safe to drink after this point. However, the taste and aroma may not be as fresh and vibrant as they would be within the recommended time frame.

Storing Blue Moon Beer for Optimal Freshness

To maintain the freshness of your Blue Moon beer, follow these storage tips:

  1. Keep it cool: Store the beer in a cool, dark place, ideally between 45-55°F (7-13°C). Excessive heat can accelerate the aging process and cause off-flavors to develop.
  2. Avoid direct sunlight: Exposure to sunlight can cause the beer to develop a "skunky" taste due to a reaction between the hops and ultraviolet light. Keep the beer away from direct sunlight to prevent this from happening.
  3. Store upright: Keep the beer bottles or cans upright
  4. Minimize oxygen exposure: When storing beer in bottles, make sure the caps are sealed tightly to minimize oxygen exposure. Oxygen can cause the beer to oxidize, leading to off-flavors and a stale taste.
  5. Rotate your stock: If you have multiple bottles or cans of Blue Moon beer, be sure to rotate your stock and consume the oldest beer first. This will ensure that you're always drinking the freshest beer possible.

The Science Behind Beer Freshness

Beer freshness is a complex issue influenced by various chemical reactions that occur during the aging process. One of the main factors affecting beer freshness is the degradation of hop compounds, which can lead to a loss of the beer's aroma and flavor. Additionally, the oxidation of beer components, such as alcohols and esters, can cause off-flavors to develop.

Research has shown that storing beer at lower temperatures can slow down these chemical reactions, helping to maintain the beer's freshness for a longer period. In one study, researchers found that storing beer at 41°F (5°C) resulted in a significantly slower loss of hop aroma compounds compared to storing the beer at 68°F (20°C).

In conclusion, Blue Moon beer, like most other beers, has an expiration date that is influenced by factors such as ingredients, brewing process, and storage conditions. By paying attention to the "best by" date and following proper storage guidelines, you can enjoy your Blue Moon beer at its freshest and most flavorful.

Remember to always drink responsibly and enjoy the art and science behind your favorite brews.