Qu'est-ce qu'un/une Minute (min) ?
Formal Definition
The minute (symbol: min) is a unit of time equal to exactly 60 seconds. It is not an SI unit but is accepted for use with the SI system. One hour contains 60 minutes, and one day contains 1,440 minutes. The minute is universally used in timekeeping, scheduling, and coordination of daily human activities.
The 60-second minute is a legacy of the Babylonian sexagesimal (base-60) number system, which entered Western timekeeping through Greek and Islamic astronomy. The number 60 has practical advantages: it is divisible by 2, 3, 4, 5, 6, 10, 12, 15, 20, and 30, making it easy to divide time into convenient fractions without dealing with repeating decimals.
Status in the SI System
The SI system uses the second as the sole base unit of time, and technically encourages the use of kiloseconds (1,000 s ≈ 16.7 min) or megaseconds for larger time intervals. In practice, this recommendation is universally ignored — no one says "meet me in 2.7 kiloseconds." The minute, hour, and day are explicitly listed as non-SI units accepted for use with the SI.
Etymology
Medieval Latin
The word "minute" comes from Medieval Latin "pars minuta prima" — the "first small part" of an hour. When the hour was divided into 60 equal parts, each part was called a "minuta" (small). The second division into 60 parts produced the "secunda minuta" (second small part) — the second.
Babylonian Mathematics
The sexagesimal system dates to Sumerian and Babylonian civilizations around 2000 BCE. Astronomers in Babylon used base-60 for recording positions of celestial bodies. This system traveled through Ptolemy's Almagest (c. 150 CE) into Islamic and then European astronomy, where it became permanently embedded in our timekeeping.
Histoire
Ancient Time Division
The ancient Egyptians divided daytime into 12 hours and nighttime into 12 hours around 1500 BCE, but these hours varied in length with the seasons. Greek astronomers, particularly Hipparchus (c. 150 BCE), introduced equal-length hours. The division of the hour into 60 minutes was established by Ptolemy and formalized in medieval European clockmaking.
Mechanical Clocks
Early mechanical clocks of the 13th-14th centuries showed only hours. Minute hands appeared on clocks in the late 16th century as clock mechanisms became precise enough to meaningfully divide hours. The minute became a practical unit of daily life only when reliable clocks became affordable — roughly the 18th century for middle-class households.
Standardization
With the telegraph and railroads in the 19th century, precise minute-level timekeeping became essential. Time zones were established in 1884, standardizing minutes globally. Today, the minute is coordinated worldwide through UTC, with atomic clocks ensuring that every country's minutes are synchronized.
Utilisation actuelle
Daily Scheduling
The minute is the fundamental unit of human scheduling. Work meetings, class periods, TV programs, train schedules, and medical appointments are all measured in minutes. Most calendar applications schedule events in 15, 30, or 60-minute blocks. International aviation uses minutes for flight time calculations and air traffic control.
Navigation and Geography
In geographic coordinates, one degree of latitude or longitude is divided into 60 minutes (arcminutes). One nautical mile is defined as one arcminute of latitude. This connection between time measurement and navigation reflects the shared Babylonian mathematical heritage of both systems.
Cooking and Medicine
Recipes specify cooking times in minutes: "bake for 25 minutes," "simmer for 10 minutes." Medical procedures track vital signs per minute: heart rate (beats per minute), respiratory rate (breaths per minute), drip rates (drops per minute).
Everyday Use
Time Management
Minutes structure daily life. Morning routines, commute times, workout durations, and meal preparation are all thought of in minutes. Productivity techniques like the Pomodoro Technique use 25-minute work intervals with 5-minute breaks.
Sports
Soccer halves are 45 minutes. Basketball quarters are 12 minutes (NBA) or 10 minutes (FIBA). Boxing rounds are 3 minutes. A marathon is completed in about 120-180 minutes for competitive runners.
Communication
Phone calls are billed per minute in many plans. Podcasts and videos are described by their minute length. "I'll be there in 5 minutes" is one of the most common phrases in daily communication.
In Science & Industry
Astronomy
Right ascension in celestial coordinates is measured in hours, minutes, and seconds. One minute of right ascension corresponds to 1/60 of an hour of right ascension, which is 1/1440 of a full circle (0.25°). Astronomers also use arcminutes for angular measurements.
Meteorology
Weather observations are recorded at standard times measured in minutes past the hour (METAR reports). Rainfall rates are sometimes expressed in mm per minute for short-duration events.
Interesting Facts
The Babylonian base-60 system gives us both 60-minute hours and 360-degree circles. Both are legacies of a mathematical system more than 4,000 years old.
A nautical mile (1,852 meters) equals one arcminute of latitude — a direct link between the minute as a time division and the minute as an angular measurement.
The longest officially recorded minutes are leap-second minutes, which last 61 seconds. The last leap second was added on December 31, 2016.
The Pomodoro Technique, one of the most popular time management methods, uses 25-minute work sessions — the time its inventor found optimal for sustained focus without fatigue.
In soccer, 'stoppage time' can add 1-15 minutes to the standard 45-minute half. The longest recorded stoppage time in a professional match was 28 minutes.
The average human attention span for a single task has been estimated at 10-20 minutes, which is why TED Talks are limited to 18 minutes.
Light from the Sun takes about 8 minutes and 20 seconds (500 seconds) to reach Earth. A message sent to Mars takes 3 to 22 minutes depending on orbital positions.