In the 24-hour system, 1:09 pm is represented as 13:09. This system uses the numbers 00:00 to 23:59 to denote the hours and minutes of the day, providing a clear and unambiguous way to express time. The practical use of the 24-hour system lies in its precision and avoidance of confusion between AM and PM designations.

Converting times to the 24-hour system is crucial in various fields such as transportation, healthcare, and military operations where precise timing is essential. It eliminates any doubts about whether a particular time is in the morning or evening. Emergency services also rely on the 24-hour clock to ensure rapid response times without misinterpreting timestamps.

The importance of using the 24-hour system extends to international communication and coordination. It serves as a standardized timekeeping method across different time zones, facilitating global interactions and scheduling across borders. This consistency helps in avoiding misunderstandings in setting up appointments, organizing meetings, or planning events involving participants from around the world.

Additionally, adopting the 24-hour system promotes efficiency and accuracy in various sectors by streamlining schedules and operations. It minimizes errors in time calculations and prevents ambiguities that can arise from using the AM/PM format. Embracing this timekeeping format enhances productivity and ensures that activities are carried out seamlessly and on schedule, making it an indispensable tool in modern-day time management.