Create your new post as you normally would BUT DO NOT CLICK PUBLISH.

Instead, look in the settings on the right side of the page under Status & Visibility and click on the word "Immediately".

Set the date and time you'd like your post to be published.

Now, where the Publish button was before, you will see a Schedule button. Click Schedule.

Click Schedule again and your post is now scheduled to be published at the date and time you set. Note: If your website is connected to social media accounts through the Jetpack plugin, the post will not be published to social media until it is published on the website.

Schedule A Post