The 24 Hour times is the method of keeping time that is most commonly used by the military, government, public transportation, hospitals, meteorologists, astronomers, those employed in emergency services, and also with computers. When speaking in military time, 07:00 am may be stated as “zero seven hundred” or “oh seven hundred”. Also, in the military, these time stamps are often written without the colon, so 07:52 would rather be written 0752.

The easiest way to convert 12 Hour to 24 Hour is:

• If the hour is exactly 12.00pm, then simply drop the 'pm'.

• If the hour is 12.00am, then change it to 0000.

• If the hour is greater than 12.00pm, then simply add 12 to the hour and drop the 'pm'.

• Otherwise, simply drop the 'am' and add the leading zeros.

The easiest way to convert 24 Hour to 12Hour is:

• If the hour is exactly 1200, then simply label it as a 'pm'.

• If the hour is 0000, then change it to 12.00 and label it as an 'am'

• If the hour is greater than 1200, then simply subtract 12 from the hour and label it as a 'pm'.

• Otherwise, simply label it as an 'am' and take away any leading zeros.