[QUICK TIP] - Facebook Scheduling
If you use a Facebook Page for your business, Facebook has removed the post scheduling feature from the Page.
In order to schedule Page posts now, you'll need to use Creator Studio, Publishing Tools, or the Facebook Business Manager.
Mobile users can use the Facebook Page Manager app to schedule posts.
TIP: I've been using the Creator Studio and find it to be helpful (it works with Instagram, too). Here's a link to Creator Studio in case you haven't started using it yet - https://business.facebook.com/creatorstudio
From the Publishing Tools menu on your Facebook Page:
"If it isn't working the way you're doing it, do it a different way."