The exact timing of the payments has not been communicated with certainty from the IRS.
Soon there will be a tool available through the IRS site link below that will allow you to check the status of your stimulus payment and update your direct deposit information if necessary. It is called Get My Payment.
Use the following links to keep up with the latest developments:
**Mark the post that answers your question by clicking on "Mark as Best Answer"
Please read what it says on the right hand side where it says “Filers: Get Your Payment”