Telling the time

What time is it?

9:00
It is nine o’clock.
It is nine.

4:20
It is twenty past four.
It is four twenty.

6:45
It is a quarter to seven.
It is six forty-five.

11:15
It is a quarter past eleven.
It is eleven fifteen.

3:30
It is half past three.
It is three thirty.

9:00 a.m.
It is nine o’clock in the morning.
‘a.m.’ stands for ‘ante meridiem’ which means: before midday

9:00 p.m.
It is nine o’clock in the evening.
‘p.m.’ stands for ‘post meridiem’ which means: after midday

Be careful:
12:00 a.m. : It is midnight.
12:00 p.m. : It is noon.