The Willard Hotel’s mint juleps (Courtesy of the Willard)

The InterContinental hotel chain is celebrating its 67th birthday by offering guests—and the public—one of its cocktails at 1946 prices. On Thursday, April 4, the Round Robin Bar at the Willard InterContinental will be offering a “April-4-For-All 1946 Cocktail Throwback,” which means the cocktail will cost just $2.

It’s the bar’s classic mint julep, but the $2 deal (plus tax and gratuity) is only good for 67 minutes, starting at 7:46 p.m. (Or 19:46 on a 24-hour clock.) The mint julep was apocryphally introduced to Washington drinkers by Sen. Henry Clay of Kentucky, who resided at the Willard during the last of his four stints in the Senate.

Round Robin bartender Jim Hewes said in 2005 that mint juleps “evoke an era of hospitality and geniality, when you were offering the best of what you had: whiskey, ice—which was hard to come by—mint, and time. They’re labor-intensive.”

They’re also not cheap, at least at the Willard, where they normally go for $15.