What Time Is It? 

Unless you work in an international industry, such as a global airline, most Americans never fully grasp military time. After all, “zero, two-hundred” (0200), “fourteen-thirty” (1430) and “twenty-three hundred” (2300) all sound more like money instead of time, right?

Military time is based on a 24-hour clock, which is why the numbers on the clock go from 00 to 23. The United States, however, uses the 12-hour clock, which is why the numbers do not go past 12, and the “a.m.” and “p.m.” must be used.

While most Americans may not need to learn military time, it is actually quite useful … and it’s very easy to learn!

Military Time: What You Need to Know

Just like a 12-hour digital clock, military time is always displayed in four digits. The first two digits represent the hour and the last two digits represent the minutes. 0000 (said “zero-hundred”) is midnight, and 1200 (said “twelve-hundred”) is noon. So far, so good.

Anything between 0001 and 1159 is basically “a.m.” time. For example, 0100 (said “zero, one-hundred”) converts into 1 a.m. and 0730 (said “zero, seven-thirty”) converts into 7:30 a.m. Pretty straightforward, huh?

Anything between 1201 and 2359 is basically “p.m.” time. The “p.m.” hours usually give people more trouble, but always remember that 1300 (said “thirteen-hundred”) converts into 1 p.m. Therefore, 1400 converts into 2 p.m., 1500 converts into 3 p.m., and so on and so on.

Below is a time conversation chart courtesy of Marine Military Academy in Harlingen, Texas. Best of all, MMA will teach you how to easily convert military time into civilian time without having to memorize the chart!

 Conversation Chart

12-Hour Clock (Civilian Time) : 24-Hour Clock (Military Time)

A Quick Trick: Subtract 12

This trick will help you with the “p.m.” hours. Here we go!

The 24-hour clock says 2200. If you want to know what it converts to on the 12-hour clock, SUBTRACT 12 from 22. It gives you 10 … 10 p.m! Was that easy or what?

Try another!

A drill instructor says the time is “sixteen-hundred.” If you want to know what 1600 converts to on the 12-hour clock, SUBTRACT 12 from 16. It gives you 4 … 4 p.m.!

Another Quick Trick: Add the Hour

Here is another trick to help you with the “p.m.” hours.

Your Swedish grandfather will arrive at your local airport at 4 p.m., and you would like to give him the military time so he is not confused.

If you want to know what 4 p.m. converts to on the 24-hour clock, ADD 4 to 12. It gives you 16 … 1600!

Try one more!

If you want to know what 10 p.m. converts to on the 24-hour clock, ADD 10 to 12. If give you 22 … 2200!

Congratulations! You have learned military time! Now go to teach a friend!

Another time standard used by the military and other organizations is Zulu time.  Read our article that explains Zulu time.

Midnight Clarification

Midnight is the most common source of confusion in military time. In standard 12-hour time, “12:00 AM” can easily be mistaken for noon. Military time eliminates this ambiguity by using two distinct markers, depending on whether a sequence of events is ending or beginning.

• 2400 (Twenty-Four Hundred): This represents the exact final minute of the day. It is used to mark the absolute end of an operational period or task.
• 0000 (Zero Zero Zero Zero): This represents the exact start of a brand-new day. It marks the beginning of an operational period.

The 2400 vs. 0000 Rule

Both terms refer to the exact same moment in time, but they dictate different dates.

• Example 1: A night mission ends on Monday night at 2400.
• Example 2: The next training cycle begins on Tuesday morning at 0000.

Both of these events occur at the exact same midnight instant, but 2400 anchors the event to Monday, while 0000 anchors it to Tuesday.

The One-Minute Buffer

To prevent logistical errors or scheduling overlaps in logs, rosters, and legal documents, the military frequently avoids using 2400 or 0000 entirely. Instead, operations are scheduled to end at 2359 (11:59 PM) or begin at 0001 (12:01 AM). This one-minute buffer removes all doubt regarding which calendar day an action takes place.

Frequently Asked Questions

Q: Why does the military use a 24-hour clock?

A: It eliminates confusion between morning (AM) and evening (PM) hours. This prevents critical communication errors during global operations, logistics coordination, and training exercises across different time zones.

Q: Do you use a colon (:) when writing military time?

A: No. True military time is written as a single four-digit block of numbers without any punctuation (e.g., 1630, not 16:30). Colons are typically used in civil 24-hour time formats, but not in official military communications.

Q: How do you say a time that includes minutes, like 0815 or 1445?

A: You state the hours first, followed directly by the minutes.

• 0815 is spoken as “Zero Eight Fifteen Hours.”
• 1445 is spoken as “Fourteen Forty-Five Hours.”

Q: What is the difference between 0000 and 2400?

A: They refer to the exact same moment (midnight), but signify different operational dates. 2400 marks the absolute end of the current day, while 0000 marks the absolute start of the next day.

Q: Why do military orders often use times like 2359 or 0001?

A: Operational planners use 2359 (11:59 PM) and 0001 (12:01 AM) to completely eliminate any risk of date confusion or scheduling overlaps that might happen at the exact stroke of midnight.

Q: What does “Zulu Time” mean?

A: Zulu Time is the military term for Coordinated Universal Time (UTC) or Greenwich Mean Time (GMT). Because the military operates globally, using a single baseline time zone (Zulu) ensures all units stay synced, regardless of their local time zones. Read our article that explains Zulu time.

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About Us…

Marine Military Academy is a private all boys boarding school located in Harlingen, TX. Educating Boys in grades 7 through 12 (and an optional post-graduate year), we provide a structured, distraction-free setting that allows students to focus on their academic and personal development. Small class sizes, individual attention, and the ability to participate in a variety of extra-curricular activities helps boys reach their potential. To learn more. visit our the Marine Military Academy’s website.