Question

Rani said, "today is monday" change in indirect speech

Answer 1

Rani said that, that day was monday

Answer 2

The right answer will be: Rani asserted that that day was Monday.

Here a direct speech has been changed into the indirect speech and no change of meaning is seen here.

It is done by adhering to the laws of grammar where the subject, the tone of the sentence, and the mode of conversation as expressed has remained totally unchanged.