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ObservanceFriday, November 5, 2027

International Stout Day

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International Stout Day is kept in early November — November 5 in 2026 — and it has something most observances of its kind do not: a founder who says so in print. The beer writer Erin Peters, who publishes as The Beer Goddess, created it, and wrote in 2017 that the year's edition was the seventh annual. The beer is much older, and its name is older still: "stout" began as a word for strong beer, attached itself to porter, and ended up meaning something porter is not.

History

The word came before the style. Merriam-Webster dates the first known use of "stout" as a noun for a very dark, full-bodied ale to 1677. Green's Dictionary of Slang gives the quotation, from a letter cited via the Oxford English Dictionary — "We will drink your healths both in stoutt and best wine" — and notes that "stout" only became a synonym for porter around 1750. For most of that stretch the word meant strength, not color: Britannica records that in the eighteenth century "stout porter" described a dark beer above 7 percent alcohol.

Porter emerged in eighteenth-century London out of a beer called brown beer, and was first valued as an aged or "stale" version of it. The familiar story credits Ralph Harwood of the Bell Brewhouse in Shoreditch with inventing it in 1722 for the city's porters; the Oxford Companion to Beer, which recounts that story, also says there is very little hard evidence for it, holding that porter more likely developed out of London brown beer and existing blending practice. What is documented is the scale — the London Museum records the Truman brewery on Brick Lane harnessing steam power to produce 200,000 barrels of porter a year by 1835.

Dublin is where stout stopped being a kind of porter. Arthur Guinness signed a 9,000-year lease on a disused brewery at St James's Gate on December 31, 1759, at an annual rent of £45 — a figure Guinness's own heritage account and The Irish Times both give. Guinness's account is that he began brewing porter in the 1770s and brewed his last ale in 1799. West India Porter, a stronger version built to survive long sea voyages, was first brewed in 1801, and became Guinness Foreign Extra Stout in 1849.

Timeline

  • 1677 — The earliest known use of "stout" as a name for strong beer, in a letter quoted by the Oxford English Dictionary. Green's dates the shift to "stout" as a synonym for porter to around 1750.
  • December 31, 1759 — Arthur Guinness signs a 9,000-year lease on the disused St James's Gate brewery in Dublin at £45 a year.
  • 1801 — Guinness first brews West India Porter, built for long sea voyages. It is renamed Guinness Foreign Extra Stout in 1849.
  • 1959 — Guinness launches what it describes as the world's first nitrogenated beer, out of Michael Ash's work on draught dispense.
  • 1988-1989 — Guinness Draught in a can is launched with the in-can "widget." Its US patent, 4,832,968, is granted May 23, 1989.
  • 2011 — The first International Stout Day, by the count implied in Erin Peters' and Los Angeles Magazine's own references.

How to observe

Order one brewery's stout on nitro and the same beer on carbon dioxide, side by side. CraftBeer.com, the Brewers Association's consumer site, explains why they are not the same drink: a nitrogenated beer carries a gas mix of roughly 70 percent nitrogen and 30 percent carbon dioxide, nitrogen is largely insoluble in liquid, and a restrictor plate forces the beer through tiny holes on its way to the glass. That is what makes the dense head and the cascade.

The idea belongs to one man. Michael Ash joined Guinness in 1951 as a mathematician and worked on the draught problem for about four years without pay. Trinity College, Cambridge, which keeps an account of his work, explains the physics: nitrogen is less soluble than carbon dioxide, so the beer could be pushed at high pressure without becoming fizzy.

Frequently asked questions

Who created International Stout Day?

Erin Peters, a beer writer who publishes as The Beer Goddess. In the Coachella Valley Independent in 2017 she put it bluntly — "Full disclosure: I created the day!" — and called that year's the seventh annual; Los Angeles Magazine named her as organizer in 2013 and called that year the third. Both imply a first observance in 2011, though neither states the year.

What date is International Stout Day?

Early November, and in recent years the first Thursday — November 5 in 2026. That rule deserves a caveat: no founding organization or established publisher documents it, and the early dates do not fit the pattern. Los Angeles Magazine's 2013 notice put the day on Friday, November 8.

What is the difference between stout and porter?

Mostly roasted barley. Britannica says that where brewers distinguish them, stout uses unmalted roasted barley and porter uses malted roasted barley; the Brewers Association's 2026 guidelines say a brown porter should carry no strong roast barley character, and put their Classic Irish-Style Dry Stout at 4.1 to 5.3 percent alcohol. Historically the line was strength instead: an eighteenth-century "stout porter" was simply a strong one.

Why is draught stout creamy rather than fizzy?

Nitrogen, usually. A nitro beer is dispensed with roughly 70 percent nitrogen and 30 percent carbon dioxide and pushed through a restrictor plate, which produces the thick head and the falling cascade. Guinness launched the first nitrogenated beer in 1959 and put the effect in a can in 1988.

Is stout growing or shrinking?

It depends which market. The Brewers Association reported stout volume in off-premise scan data down 9.9 percent in 2025 against 2024, among the larger craft-style declines that year. Diageo reported to the Securities and Exchange Commission that Guinness grew organic net sales 10.9 percent in the six months to December 31, 2025.

When is International Stout Day?

YearDateDay
2027November 5Friday
2028November 5Sunday
2029November 5Monday
2030November 5Tuesday
2031November 5Wednesday

Sources

Claims deliberately not made. The "first Thursday of November" date rule is carried only by daily-holiday aggregators, which are rejected as sources; it is reported here as the recent pattern, with the 2013 exception named. The founding year 2011 is not stated outright by either acceptable source and is presented as what the "Seventh Annual" (2017) and "third year" (2013) references imply. Guinness's "Extra Superior Porter" naming history and an 1821 recipe date appear only in trade press and are absent from Guinness's own published heritage material, so they are omitted.

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