1. It was the first Sunday of December.

  2. It was the first Sunday in December.

To me 'of' seems like: 'possession' and 'in' seems like: 'containing'.

Sometimes we get to see:

  1. Buildings in this city are so tall.

  2. Buildings of this city are so tall.

This has always been a matter of confusion to me.

Please explain.

Thank you.


I cannot see any real difference in meaning between sentences 1 and 2.

Regarding sentences 3 and 4, there is a slight difference.

  • Sentence 3 implies that only some of the buildings are tall.
  • sentence 4 implies that all building are tall.

However, the sentences 3. and 4 are not entirely correct, since some articles should have been used with "buildings", depending on the intended meaning.

The choice of article will change the meaning of "in / of" also, together with the meaning of the sentence.

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