You can set or adjust the daily send schedules of your campaigns. You can even set different delivery windows for each email version or email sequence.
You can find the settings by going into the campaign, click on the Email Sequence tab, and click the Edit button on the email version you want to set the schedule.
A pop-up editor screen will appear, just scroll down until you see the Delivery Windows section. This is where you set the day and the specific time per day you want this email version to start sending. 
Scroll back up, and click on the X to save and close the editor.
