OK, you have selected the social profiles you will post to, crafted your message, added a link and image and now you want this post to be published multiple times in the future. This way you will make sure that that particular content will reach as many people as possible.
In the Publish pop-up, you should scroll down to the Create a schedule option and turn on the feature
Select a date and time
Add as many schedules as you want
Click on the small trash icon next to a particular schedule to delete it
Voila! You have scheduled your post to go live multiple times on different dates and at different times