lesson
Updated 6 days ago · 2 views
Imagine you are waiting at a bus stop and the digital screen shows your bus arrives at 15:00.
Where is the number 15 on a regular wall clock? It turns out, transit clocks have a clever way of telling time.
Two Halves of a Day
One whole day has 24 hours, but a standard 12-hour clock only counts up to 12 before starting over.
To tell morning from night, we use AM for the morning and PM for the afternoon and evening.
📊Interactive diagram
If a friend invites you to a movie at 7:00 without saying AM or PM, you might show up at breakfast instead of dinner!
How do train stations and airports make sure nobody mixes up morning and night?
The 24-Hour Clock
Buses and trains use a 24-hour clock that numbers every single hour from 0 up to 24 with no AM or PM.
Morning hours look almost identical: 8:00 AM simply becomes 08:00 with a leading zero.
What happens once the clock hits 12:00 noon?