the top of the hour, but often it is not spoken.
it is six o'clock. - it is six.
it is eight o'clock. - it is eight.
it is twelve o'clock. - it is twelve.
it is two o'clock. - it is two.
point 2: twelve o'clock has two special names. noon for daytime and midnight for night time.
the meeting is at noon.
great! see you at twelve.
i was asleep at midnight.
i was still awake at 12.
point 3: for time 30 minutes past the hour, you can use the term "half past".
point 4: for time 15 minutes past the hour, you can use the term "a quarter past".
point 5: for time 45 minutes past the hour, 