IFTTT helps you connect multiple social media services including Amazon Alexa, Facebook, Twitter, Instagram, Fitbit, Slack, Skype, and more. I use this site to automatically post tweets to my twitter account with the date/time applet on certain days of the week and at times that I select. You can do the same for Facebook as well. This is how I post a reminder for people to submit ideas for my Friday dance with a post that runs each Wednesday. In this way I am not glued to my PC trying to schedule posts. Because of the numerous apps that can be connected it does much more than Hootsuite can do alone, especially when you know you want a certain message to repeat each week.
There is also an app for both Android and Apple phones so you can set up and monitor your applets on the go!
Here are just two examples out of hundreds of options: