Which government advertising campaign featured the slogan "Keep Calm and Carry On" but was never actually used during its intended time period?

Throughout history, governments have created some of the most memorable and impactful advertising campaigns to influence public behavior, raise awareness about important issues, or promote national initiatives. From public health messaging to wartime propaganda, these campaigns have shaped society in profound ways. Test your knowledge about iconic government advertising campaigns that made history!

This is a live public trivia poll on AIPolls.Net. Vote and see real-time results.

British Ministry of Information's WWII poster campaign, discovered and popularized only decades later
U.S. Department of Defense's Cold War civil defense initiative
Australian government's 1970s national unity campaign
Canadian government's response to the 1995 Quebec sovereignty referendum