National Absinthe Day

Facts About National Absinthe Day

Bohemian Paris Had Its Own “Green Hour”  

In late 19th‑century Paris, cafés advertised l’heure verte, or “the green hour,” typically around 5 p.m., when workers, artists, and writers would gather specifically to drink absinthe.

By 1910, the French were consuming an estimated 36 million liters of absinthe per year, and the drink had become so intertwined with café culture that wine producers and temperance advocates saw it as a direct rival.  

Absinthe’s Fame Rose With a Vineyard Plague

Absinthe’s popularity in France accelerated in the late 19th century largely because of the phylloxera epidemic that devastated French vineyards.

As wine supplies collapsed and prices climbed, absinthe, which did not rely on grapes, became an affordable, high‑proof substitute, helping it shift from a soldier’s ration and apéritif to a mass‑market drink across social classes.  

Thujone Levels in Traditional Absinthe Were Overstated

Modern chemical analyses of sealed 19th‑ and early 20th‑century absinthe bottles found that thujone levels were far lower than prohibition‑era critics claimed.

A widely cited study in the Journal of Agricultural and Food Chemistry reported concentrations mostly below 10 mg/kg, comparable to or even lower than the strict limits now set in Europe, undermining the idea that historic absinthe contained massive doses of a unique neurotoxin. 

Modern Regulations Treat Absinthe Like Other Herbal Spirits

Current European Union law does not ban absinthe but regulates its thujone content, allowing up to 35 mg/kg in bitter spirits and 10 mg/kg in other alcoholic beverages.

In the United States, absinthe sold legally must be “thujone‑free,” interpreted by regulators as containing less than 10 parts per million, bringing the drink into line with safety standards applied to other wormwood‑flavored products.  

The Famous “Absinthe Murders” Involved Much More Alcohol 

One of the most influential anti‑absinthe stories was the 1905 case of Swiss farmer Jean Lanfray, who killed his family after a day of heavy drinking.

Court records showed he had consumed multiple glasses of wine, brandy, and coffee laced with spirits, along with just two small absinthes, yet public outrage focused almost entirely on absinthe and helped spur Switzerland’s 1910 nationwide ban.  

Absinthe’s Distinct Cloudiness Is a Chemistry Lesson in a Glass

The milky “louche” that appears when water is added to absinthe is caused by essential oils, primarily anethole from anise and fennel, which are soluble in strong alcohol but not in diluted mixtures.

As the alcohol content in the glass drops, these oils form microscopic droplets that scatter light, creating the opalescent effect that became a visual hallmark of absinthe service.  

New Orleans Helped Keep Absinthe Culture Alive in America

Before national prohibition, New Orleans was a major American center of absinthe drinking, with the Old Absinthe House bar on Bourbon Street serving its signature “Absinthe Frappé” as early as the 1870s.

Even after bans, local cocktail culture preserved absinthe’s role through substitutes and rinses in drinks like the Sazerac, which helped smooth its reintroduction when legal absinthe returned to the U.S. in the 21st century.