Day (day)
Definition: Day na time unit wey equal 24 hours, or 86,400 seconds.
History/origin: Day na one of the oldest natural time units, based on Earth rotation and the light-and-dark cycle.
Current use: Days dey important for calendars, deadlines, shipping estimates, habits, medicine schedules, and project planning.
Year (yr)
Definition: Year na long calendar unit based on Earth solar orbit. For unit conversion, dem dey commonly average am as 365.25 days.
History/origin: People organize years around seasons, planting cycles, and sky observations, then dem refine am through calendars for civic and scientific use.
Current use: yr dey used for ages, anniversaries, mortgages, warranties, leases, climate averages, school grades, investment horizons, history timelines, and long-term records.