Go to your Page.
Click Publishing Tools from the top drop-down ‘More’ menu.
Click + Create Post.
Create your post.
Scroll down and click ‘Schedule for later’ and select the date and time when you want the post to publish. Click ‘publish’ for it to be scheduled.
Oops! Need to make a change?
Click on the post – then click on the three dots on the right-hand side of the actual post – then click ‘edit post.’