First begun in 2011 by craft-beer advocate Ashley Routson —known on Twitter, Instagram, and Facebook as the Beer Wench— the day is an informal celebration of India Pale Ale, an intensely hoppy ale, named —somewhat incorrectly— for beers shipped from England to India in the 18th and 19th centuries. Routson noted the style's popularity in present-day United States:
At the 2012 Great American Beer Festival, the most entered style category was the American-Style India Pale Ale with 203 entries. The second most entered category was its close cousin, the Imperial India Pale Ale (128 entries).
So, what's in your glass? Today, make it an IPA!