The hour (h) is a time unit equal to 60 minutes or 3,600 seconds, the standard measure for work shifts, travel times, and business hours worldwide. Payroll calculations, flight durations, and daily schedules are all structured around hours. One hour equals exactly 3,600 seconds, and 24 hours make up one day.

The year (yr) is a time unit equal to approximately 365.25 days or 31,557,600 seconds, representing one full orbit of the Earth around the Sun. It is the primary unit for age, financial reporting, interest rates, and long-term contracts, with the quarter-day surplus handled by leap years. One year equals roughly 52.18 weeks or about 8,766 hours.