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The Complete Guide to Military Time and the 24-Hour Clock

Master 24-hour clock notation and military time conversion with pronunciation charts and operational examples.

Military time and 24-hour timekeeping eliminate ambiguity across global aviation, emergency services, healthcare, and telecommunications by assigning every minute in a day a unique four-digit identifier from 0000 to 2359.

1. Structure of the 24-Hour Clock

Unlike the 12-hour AM/PM system which recycles numerals twice per day, military time counts continuously from midnight (0000) to 2359. Hours are written without a colon in pure military format (e.g. 1730 hours) or with a colon in standard ISO 8601 notation (17:30:00).

2. Verbal Phonetics and Pronunciation

On-the-hour timestamps are spoken with "hundred" (e.g. 0600 is "zero six hundred hours", 1400 is "fourteen hundred hours"). Split minutes are appended directly (e.g. 1430 is "fourteen thirty hours", 0805 is "zero eight zero five hours").

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Frequently Asked Questions

Why does aviation and emergency medicine use military time?▼

Military time eliminates deadly AM/PM ambiguities in flight plans, surgery schedules, and emergency response.