Many countries use military time, with Germany and France being notable examples. In these countries, the 24-hour system is employed exclusively in all contexts, including casual conversation.
In Romania, the 24-hour clock is used exclusively for both government and private citizens. In Asia, Vietnam has been using the system since the 19th century. While the UK employs both systems: the 24-hour clock for government documents, train schedules, and transit, while the 12-hour clock is used in other areas.
Interestingly, while the U.S. military uses the 24-hour clock, the United States as a whole primarily uses the 12-hour clock.
Additionally, as of 2024 (according to the World Population Review), 17 other countries also use the 12-hour clock. These include Australia, Bangladesh, Canada, Colombia, Egypt, El Salvador, Honduras, India, Ireland, Jordan, Malaysia, Mexico, New Zealand, Nicaragua, Pakistan, Philippines, and Saudi Arabia.