Do AM and PM have periods?

Related questions

1. Does midnight start the next day?
2. How do I know if my flight is AM or PM?
3. Do you put a space before AM or PM?
4. Why is the day divided into 24 hours?
5. Do flights ever leave early?
6. Are flights listed in local time?
7. Is 12 midnight the next day?
8. Do planes ever leave early?
9. Is it 12 am tomorrow or today?
10. What is 5pm military time?

Tags

1. #letters
2. #phrases
3. #meridiem
4. #before
5. #abbreviations
6. #meaning
7. #latin
8. #english
9. #lowercase
10. #respectively
11. #preferred
12. #other
13. #after
14. #style
15. #periods