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What Is 0000 Military Time?

Convert military (24-hour) time to regular 12-hour AM/PM time and back, with a full 24-row reference chart.

Accepted formats: 1730, 17:30, 5:30 PM

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    0000 military time is 12:00 AM in regular 12-hour time — midnight, the very start of the day. It is the special case people trip over most: the 12-hour clock calls the first minute of the day 12:00 AM, while the 24-hour clock counts it as hour zero, written 0000 and often spoken as "zero hundred".

    A related quirk is 2400: some schedules use 2400 to mark midnight at the end of a day (say, a shift that finishes at 2400 on Tuesday), while 0000 marks the same instant as the beginning of Wednesday. Timetables, guard rosters and legal documents lean on 0000 precisely because "12 AM" and "12 PM" are so often confused.

    This page loads with 0000 already converted and flagged as midnight. Try any other time in the form — the converter accepts 0000, 00:00 or 12:00 AM, works in both directions, and the full 24-row chart underneath starts at exactly this hour. Everything is computed locally in your browser.

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    Accepted Formats & Rules

    • Two-way conversion between 24-hour military and 12-hour AM/PM time.
    • Flexible parsing: 1730, 17:30, 930, 5:30 PM and bare hours all work.
    • Built-in 24-hour reference chart with midnight and noon notes.

    Key Benefits

    ✓ Converts both ways: military (24-hour) to regular 12-hour AM/PM time, and AM/PM time back to the four-digit military format.
    ✓ Forgiving input — type 1730, 17:30 or 5:30 PM and the parser understands it, flagging midnight (0000) and noon (1200) explicitly.
    ✓ Full 24-row reference chart from 0000 to 2300 rendered right on the page, so you can double-check any hour at a glance.

    Use Cases

    • • Instantly read a military time from a duty roster, flight plan or hospital chart as regular 12-hour AM/PM time.
    • • Write an appointment or shift given as 5:30 PM in the four-digit 24-hour format that schedules and logs expect.
    • • Settle the midnight and noon confusion for good: 0000 is 12:00 AM and 1200 is 12:00 PM, both flagged explicitly with a full 24-row chart to double-check.