The default schedule for your Smart Newsletter is 8am, Monday - Friday.
In the 'Update Schedule' widget:
Set your time (in CST and military/24 hour format)
Set your Cutoff Offset = The amount of minutes before your newsletter send time to stop including new content. Enter an amount in minutes. The default value for this is 90 minutes. (For example, if you send your email at 10am and you want to begin your review window at 4pm the night before, enter 1080)
*Note that any changes to your newsletter must be entered 90 minutes prior to send time*
Choose your send frequency from daily, weekly, every other week, or monthly. If you are not sending daily, choose your send day of the week.