Timezone Tool
Convert between 12-hour clock time and 24-hour military time in either direction, and look up the NATO phonetic letter for a UTC offset.
Reference
Pick a UTC offset to see its military zone letter, used in aviation and military communication instead of city names.
What's commonly called "military time" is the same 24-hour clock used as the everyday default across most of the world outside North America — it's only called "military" in places where the 12-hour AM/PM clock is the cultural default. The advantage is real regardless of what you call it: no AM/PM ambiguity, and it sorts correctly as plain text.
Working with a full date and time, not just the clock portion? Use the Timestamp ⇄ Date Converter instead.
Related
Look up what PST, CET, IST, and others actually mean.
Live 24-hour clocks across any set of cities.
Find overlapping working hours across timezones.