ously with "on time."
Punctual can also, when talking about grammar, mean to be accurate.
According to each culture, there is often an understanding about what is considered an acceptable degree of punctuality.
"I give it as my deliberate and solemn conviction that the individual who is habitually tardy in meeting an appointment, will never be respected or successful in life."
"I have always been a quarter of an hour before my time, and it has made a man of me."
"Unfaithfulness in the keeping of an appointment is an act of clear dishonesty. You may as well borrow a person's money as his time."
"It is no use running; to set out betimes is the main point."
"I could never think well of a man's intellectual or moral character if he was habitually unfaithful to his appointments."
"The main problem with punctuality is that there is rarely anyone there to appreciate it."