You will be able to post the message right away or schedule it for a future date and time.
After figuring out and setting when you want to post the message click the Next: Schedule It! or Next: Send it! button in the right hand corner. If you set the this message to Post now clicking the Next: Send it! button will immediately broadcast your message to the social media accounts you chose. If you selected Post later the Next: Schedule It! button will submit the message to be posted at the date and time you specified.
Some examples of how these posts will show on Twitter and Facebook.