by Saturday evening

English as a Second Language English Vocabulary, Grammar and Idioms
1

Are these sentences both correct:
[color=indigo]
1-I do not want to have anything to do by Saturday evening.
[color=red]2-By Saturday evening I do not want to have anything to do.

Do they mean the same?

Gratefully,
Navi.

2

yes.

3

If I convert the original sentence into the following ones:

(1) I do not want to have had anything to do by Saturday evening.
(2) I have not wanted to have anything to do by Saturtay evening.
(3) I have not wanted to have had anything to do by Saturday evening.

  1) Which one(s) is/are correct?
  2) Does the changes have impact on the meaning of the original sentence? 

   Thanks..
4

Any change of tense has an impact on the meaning of the sentence and also, more importantly, on the contexts in which it can be used.

5

Are all the three sentences grammatically correct?..

6

yes