I don't understand why in news stories spoken or written the time reference sometimes has no preposition. For example, in the following paragraph, it's just "Sunday" instead of "on Sunday".
"A black Harvard scholar said Sunday he has been able to joke about his arrest by a white police officer that led to a national debate on race, but he also has received death threats and bomb threats."
Thank you in advance.
Top answer
On is optional with days of the week. Last or next are often used, however.
— Philip
On is optional with days of the week.
Last or next are often used, however.
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You have been given two good answers. May I just add that the on in on Sunday is more often omitted in American English than British English. Actually, there are quite a number of cases in which the preposition is optional. A couple of examples:
He came [on] Sunday morning. I waited [for] two hours.