Are all IELTS modules on the same day ?

No. The IELTS has 4 modules Writing, Listening, Speaking, and Reading. The Writing, Listening, and Reading modules are held on the same day, but the Speaking module is held on a different day. The IELTS examining body will inform you about the date prior to the exam. The Listening test is normally held 3 days before or after the Writing, Listening and reading test is held.