When sharing a creation, you can either share it via email immediately or schedule sending.
To share your creation later, you need to click the Share or Print button in the editor:
Then click the Email option (as Send Later works only for email delivery) and add your recipient(s):
Switch on the Send it later toggle, choose time and date, and click Send:
You can check the creation status in the My Creations tab:

Your creation status will be changed to Shared:

But do not worry, it is not sent yet. Once the creation has been delivered on the indicated date, you will receive a notification via email:

Enjoy, and remember that if you have any questions regarding your creation, just contact us.