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Free Military Time Calculator

Editorial policy

How we research, write, test and update every tool and guide on the Site.

Last updated: November 11, 2026

Our goal

Every page on freemilitarytimecalculator.com has one job: give a correct answer about military time quickly, then explain the rule behind it so readers can check the answer themselves.

How we research

We base rules and facts on primary sources first. The 5 sources we rely on most are:

  • National Institute of Standards and Technology (NIST): time-of-day conventions, including 12 a.m., 12 p.m., 0000 and 2400.
  • ISO 8601: the international standard for writing dates and times in 24-hour notation.
  • U.S. Department of Labor (DOL): Fair Labor Standards Act rules on hours worked, breaks, overtime and record keeping.
  • International Civil Aviation Organization (ICAO) and FAA practice: Coordinated Universal Time (UTC) and Zulu time in aviation.
  • Official device documentation: Apple, Google, Microsoft and Samsung help pages for clock settings.

Where competing websites disagree, we follow the primary source and say so on the page.

How we write

We put the answer first, show worked examples with real times, and explain the formula behind every result. Drafts may be prepared with software tools, including AI writing assistants. Every page is reviewed, edited and fact-checked by an editor before it is published, and no page is published without that review.

How we test the tools

The conversion logic is checked by automated tests that convert all 1,440 minutes of the day in both directions and confirm that every result converts back to the starting time. The tests also cover midnight, noon, invalid times such as 2500, and shifts that cross midnight. Tools are re-tested before every update is published.

Updates and corrections

Each guide shows the date it was published and the date it was last updated. When a reader reports an error, we check it against the sources above and correct the page within 5 business days if the report is confirmed. Report errors tocontact@freemilitarytimecalculator.com.

Independence and advertising

The Site is free and supported by advertising. Advertisers do not pay for, review or influence our tools or articles, and ads are kept visually separate from the content. We do not accept paid links or sponsored posts.

Who writes the Site

The Site is written and maintained by the Free Military Time Calculator team. Learn more on the About page.