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Can I say,

It was Sunday afternoon. / It was a Sunday afternoon.
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It was Sunday afternoon.
It was a Sunday afternoon in the month of May.
It was a Sunday afternoon in the spring of 2008.
It was a beautiful Sunday afternoon. >> >> It is OK provided that you give a choice of which Sunday afternoon it was.
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Vincent TeoThanks, but why do we use "a Sunday afternoon", but sometimes we don't? Why?

The word afternoon is unimportant with regard to using the article. No article is usually used when the reference is to the Sunday closest in time at the moment of speaking:

He came on Sunday afternoon. (last Sunday afternoon)

He came on Sunday. (last Sunday)

He'll come on Sunday afternoon. (next Sunday afternoon)

He'll come on Sunday. (next Sunday)

He came on a Sunday afternoon. (Not last Sunday. You could also say: He came one Sunday afternoon.)

CB
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Thanks, but why do we use "a Sunday afternoon", but sometimes we don't? Why?
 Cool Breeze's reply was promoted to an answer.
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