Difference between AM and PM

Welcome to Moomeaux Math and Science and the difference between a.m. and p.m. If you live in the United States, Canada, or Australia, you use 12-hour system for telling time. But why is a.m. and p.m. important? If you look at this clock, it reads 7:00. However, is this 7:00 in the morning or 7:00 at night? This is where a.m. and p.m. help. The 12-hour system divides the 24 hours of day into two periods lasting 12 hours each. The first 12-hour period is designated as a.m. and it runs from midnight to noon. The second period marked p.m. covers the 12 hours from noon to midnight. a.m. comes from the Latin phrase meaning ante meridiem, which translates to before midday. And p.m. from the Latin phrase post meridiem, which translates to past midday. There are 24 hours in day, and this requires the hour hand to pass the 12 twice. You can see this on timeline. You start at 12, then 1 2 3 4 5 6 7 8 9 10 11, 12, and then you go back to 1 2 3 4 5 6 7 8 9 10 11, and then you're back at 12. Most often midnight is considered the start of the day. Midnight is classified as 12 a.m. The hours after midnight and before noon are written as a.m. These 12 hours start late at night and then transition to early morning. 3:00 3:00 a.m. is late at night, but 7:00 a.m. is when many people are waking up. 12:00 p.m. is considered midday or noon. The hours between noon and midnight are written with p.m. These hours start during sunlight and end in darkness. Now, let's apply what we've learned. Drew wakes up in order to go to school at 7:00. Would you use a.m. or p.m.? Drew wakes up after midnight and before noon, so you would use a.m. Adam's favorite restaurants stop serving dinner at 8:00. Would you use a.m. or p.m.? Dinner time is after midday or noon, but before midnight, so you would use p.m. And finally, the sun rises at 6:00 and sets at 7:00. Which would you use? The sun rises after midnight and before noon, so you would use 6:00 a.m. And then the sun sets after noon and before midnight, so you would use 7:00 p.m. If you'd like to know more about telling time, this playlist will help. And as always, thanks for watching, and Moomeaux Math uploads new math and science video every day. Please subscribe and share.