April Fools Day is less than 6 months away! Time to start planning!Your website's April Fools Prank may be the most high-stakes launch of the year! The usual best practices don’t work. There are no second chances, you can’t just re-launch on April 2nd. Many silos must sign off on the plan, yet the plan must be kept secret. Loads shift from zero to millions in one day with little room for mistakes. And what if the prank backfires and has to be disabled quickly?In this talk I’ll discuss how to communicate across the company to get buy-in, how to load test using “dark launches”, rollbacks using feature flags, and other techniques for assuring a high stakes launch happens correctly. I’ll include stories from many AFPs both that I’ve observed and been a part of...and maybe you'll learn something useful for other launches too!