Year (yr)
The year, symbol yr, is the time Earth needs to go around the sun—about 365.242 days. People have tracked years for farming and religion for a long time, creating calendars. The Julian and then the Gregorian calendars made the year’s length more exact by adding leap years. Today, the year is used everywhere for history, science, work, and culture. Years are closely linked to how people see seasons and life’s cycles.
Minute (min)
The minute, symbol min, is 60 seconds. Its name comes from the Latin for “first small part.” Minutes have been used since ancient times when base-60 number systems shaped early timekeeping. Minutes are part of daily life—used in clocks, plans, and math. Although the SI system uses seconds, minutes are still important for daily and cultural needs, thereby linking science with everyday life.