ELI5: Explain Like I'm 5

Proper time

Proper time is a way of measuring how much time has gone by. It is measured in units called seconds. There are 60 seconds in 1 minute and 60 minutes in 1 hour. There are also 24 hours in 1 day, 7 days in a week, and 365 days in a year. By counting all these seconds, minutes, hours, days, weeks, and years, we can keep track of what time it is, and how much time has passed since then. Proper time helps us keep our lives in order, so we know when to go to school or work, when to book holidays, and when to meet up with friends.