It is your choice bro. IELTS speaking can be @ 3:00, 5:00, 5:40... Local Time. The Writing, Reading and Listening exam can be @ 3:00, 3:40, 4:00, 4:40... When you register, they ask you to choice the test time and date on your IELTS account. So, choose the test time and date first and then process the payment through BRITISH COUNCIL bank account, then which you have to send the bank slip through their email for confirmation. Ask me if you have any unclear questions; I can help.