What time is 01:39?

01:39 is 1:39 AM on a 12-hour clock and "01:39 Hours" in Military Time. We use this system throughout the world (not just the military) and leverages a 24-hour time clock rather than the 12-hour AM/PM system known to most English-speaking countries. Below are ways to convert 01:39 through a time chart, automated calculator, and ways to convert by hand.

01:39 conversion cheat sheet & time chart

How to convert 01:39 from 24-Hour Time to 12-Hour Standard Time

It is easy to convert from 24-hour time to 12-hour time once you know a few tricks. The primary difference between the two is that the hours in a 24-hour clock go all the way up to 23 (from 0 to 23). In a 12-hour clock, the hour resets to 1 after noon (midday). Follow the steps below to convert 01:39 to 12-hour time.

1. First, determine whether or not 1 is greater than 12 (recall that this is one of the distinctions of the 12-hour clock, there are no hours "greater" than 12 on it)
2. Since 1 is lower than 12, there isn't much to do! We can just add the "AM" designation to the end of the time: 1:39 AM

DID YOU KNOW?

24-hour time is used in aviation, military, meteorology, logistics, and other fields. The 12-hour clock is only used in 18 countries globally, including the United States and Canada. 24-hour time and military time are very similar! See our military time converter for more information.

1 Hour Conversion Chart