The publishing schedule controls when your Authorised page goes live.
Click on the Properties tab.
The Properties screen opens.
The Set Publishing screen shows the default publish setting, which is set to Immediate.
If you wish to delay the publication until a future date and /or time you can set up a new publication schedule:
Once you've set a new publishing date, save the page and submit and approve it- the changes won't go live on the website until the date you've set.
To enable you to control how long your web page is published for you can set an Expiry and a Review date and time.