In the ‘Edit Targeting’ section of the Line Item, under the ‘Day Parting’ section, you can select specific times of day and days of the week you would like your campaign to serve.

• Time Zone Consideration: Day parts target users according to the time zone they are located in when the ad is served. For example, a Line set to serve from 9am to 9pm in the U.S., will start serving at 9am EST to users on the eastern coast, and will start serving to users on the western coast at 9am PST.
• Multiple Time Zones: To serve ads across the U.S. at the same time in every time zone, you will need to create a separate Line for each time zone and set the day parts accordingly.
• Selecting Days: If you wish to serve ads on a specific day, check the box next to that day of the week. To stop serving ads on a particular day, simply uncheck the box next to that day.