You can always choose to schedule your newsletter for a specific day/time or send it out immediately.
Follow The Steps Below:
Step 1. Head over to your Outbox, hover over the date of the newsletter you would like to schedule, and click the Edit button.
Step 2. In the Newsletter Builder, click the Send header and then click the Send button to expand the dropdown menu. Choose to either Schedule for Later or Send Now.
Step 3. If choosing to Schedule For Later, Click on the calendar to select a future date.
Step 4. Select the time of day you would like the newsletter sent.
Step 5. Once you selected the date and time click Schedule. You will see your newsletter within the Scheduled section of the Outbox.