Decimal time

Decimal time divides the day into units based on powers of ten rather than the conventional 24 hours, 60 minutes, and 60 seconds.

French Revolutionary time: A French system that divided the day into 10 hours, each with 100 minutes and 100 seconds. Its 1790s design shows one concrete way decimal units could replace clock time.
French Revolution: A period of political and social upheaval in France beginning in 1789. The revolutionary government created the setting for decimal clock reform.
Decimal timekeeping: The practice of displaying or recording time in decimal units rather than conventional hours and minutes. It describes the practical use of decimal divisions on clocks and records.
Twelve-hour clock: A clock convention that labels two cycles of 12 hours within each day. Its familiar dial contrasts with decimal time's proposed 10-hour day.
Metric time: A family of proposals to express time using metric units or powers-of-ten divisions. Decimal time belongs to this broader effort to make time units decimal.
French Republican Calendar: A calendar adopted by revolutionary France that reorganized years, months, weeks, and days. Its decimal day was part of a wider redesign of the calendar.
Swatch Internet Time: A 1998 time system dividing the day into 1,000 units called beats, measured in Biel Mean Time. It offers a modern, commercially promoted decimal-like way to represent a day.
Twenty-four-hour clock: A time notation that numbers hours from 00 through 23 within a day. It preserves 24 hours while avoiding the twelve-hour clock's repeated cycle.
Decimal minute: A time unit equal to one hundredth of a decimal day in systems that divide the day into 10 hours. Its size follows directly from dividing the decimal hour into 100 parts.
Metric system: A measurement system organized around decimal units and standardized measures. Decimal time shared the metric reformers' goal of coherent base-ten units.

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