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Coca-Cola launched 'New Coke', a famous marketing misstep

On this day · 23 April 1985
45 sec read

On April 23, 1985, Coca-Cola changed its 99-year-old formula, then watched a furious public force the old recipe back in 79 days.

Verified · Introducing New Coke (Harvard Business School case)

On April 23, 1985, the Coca-Cola Company announced it was replacing its flagship soft drink with a sweeter, reformulated version soon nicknamed New Coke, the first change to the secret formula in 99 years. Executives, rattled by Pepsi’s gains, believed taste tests pointed the way: nearly 200,000 people had preferred the new flavor in trials.

The public had other ideas. Coca-Cola was swamped with up to 8,000 calls a day and some 40,000 complaint letters, as drinkers mourned the loss of a brand they felt belonged to them.

Consumer research measured taste, but missed the emotional attachment people felt to the original.

The retreat was fast. Just 79 days after launch, the company brought back the old recipe as Coca-Cola Classic on July 11, 1985. It quickly outsold New Coke, and the episode became a textbook lesson in how brand loyalty can defy market research.

99 yrs
since last formula change
79
days until reversal
8K
complaint calls a day

Sources & references

2 references

Well-established. Corroborated by 2 independent sources.

1 Introducing New Coke (Harvard Business School case) business school case study “On April 23, 1985, the Coca-Cola Co. announced a decision that would rock the world... three months of unrelenting protest against the loss of Coke.” store.hbr.org ↗
2 New Coke: The Most Memorable Marketing Blunder Ever? company history “The Coca-Cola Company introduced reformulated Coca-Cola, often referred to as 'new Coke,' marking the first formula change in 99 years... The return of original formula Coca-Cola on July 11, 1985.” coca-colacompany.com ↗
✓ Last reviewed Jun 7, 2026

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