You can scheduled your mailing to send at a later date or time by selecting the Send later option from your Add Guests/Recipients page:
After selection this option, you will be able to choose the date, time, and time zone that you would like the mailing to be sent. You can then press the blue Schedule button to schedule the mailing to be automatically sent at your selected time.
Your card will send to all of the recipients on your list - unfortunately, we don't have an option for you to schedule sending for multiple groups at the same time.
If you card has been successfully scheduled, an information bar will appear toward the top of your Manage Tracking page showing the date and time of the scheduled send:
Editing your card after scheduling, or canceling your scheduled send
If you need to make changes to a card you've already scheduled to send at a later date/time, you will first need to cancel the scheduled send. You can make changes by selecting the Edit or cancel scheduled sending button from your Manage Tracking page. You can then re-schedule your card after you've finished making changes.