Texas Certified Nursing Assistant (CNA)

Which of the following shows the correct conversion of 9:00 p.m. to military time?

1. 1900 hours

2. 2000 hours

3. 2100 hours

4. 2200 hours

The correct answer is: 2100 hours

To convert standard time to military time, you need to understand how the military uses a 24-hour clock. Military time runs from 0000 hours at midnight to 2359 hours just before midnight. For the given time of 9:00 p.m., you start at 12:00 a.m. (midnight) and count the hours up to the evening. In military time, you add 12 to any hour after noon. Therefore, for 9:00 p.m., you take 9 and add 12, resulting in 21:00 hours. Consequently, 9:00 p.m. in military time is correctly expressed as 2100 hours. This is why this answer is the appropriate conversion.