If you’d like to add information to your Facebook Page NOW (while you have time!) but don’t want it to appear until later, you can actually pre-schedule Facebook content. There are tools for that, but it’s really pretty easy to do within Facebook itself.
Go to your PAGE (at this time you can’t do this from your personal profile page, only from a business page) and insert your cursor in the Status window.
Click the 
icon in the lower-left of the sharing tool. It’ll look something like this:
Once you click on the little clock, it will ask you to choose the year, month, day and time you want the post to appear. You can backdate posts, or schedule up to six months in advance.
Click here for the instructions, straight from Facebook.
It’s really pretty easy, and definitely a handy feature!