Roast Date

The roast date is the calendar date on which coffee beans were roasted, printed on the bag as a freshness indicator. It is the single most important piece of information on a bag of specialty coffee because it tells you exactly how fresh the beans are. Unlike a "best by" date — which is an arbitrary shelf life estimate — the roast date gives you objective data to determine whether the coffee is in its optimal drinking window.

Coffee freshness declines in a predictable curve after roasting. For the first few days, the beans are still degassing CO2 and haven't reached their peak flavor. Most specialty coffees hit their sweet spot between 7 and 21 days after roasting for filter brewing, and 10 to 28 days for espresso. After about 4–6 weeks, noticeable staling begins: the aromatics fade, the cup tastes flat and papery, and the distinctive origin character diminishes. By 2–3 months post-roast, most coffee has lost the qualities that made it worth buying.

The presence or absence of a roast date is a reliable signal of quality. Nearly all specialty roasters print a clear roast date on every bag. Most commercial and grocery-store brands use only "best by" dates, often set 6–12 months after roasting — by which point the coffee is well past its prime. If a bag doesn't have a roast date, it's generally safest to assume the beans are not fresh.

Proper storage extends the freshness window but cannot reverse staling. Whole beans stored in an opaque, airtight container at room temperature — away from heat, light, moisture, and strong odors — will maintain acceptable quality for 3–4 weeks past roast. Freezing in vacuum-sealed portions can extend freshness for months, but once thawed, the beans should be used promptly.