In general, the reading, writing, and listening tests are taken on the same day. As for the speaking tests, it is taken either one week before or after the date of the three tests. You can choose when to take the speaking tests in most of the centers and in some test centers, you will even be able to take all tests. So the answer to this frequently asked question for the IELTS test is - it depends on the test centers but generally speaking, you will be able to give a reading, writing, and listening test on the same day.