If you want to create announcements to post at a certain date and time, follow these steps.
Click the Announcements link.
Type a title for the Announcement in the title field [1] and add content in the Rich Content Editor [2]. Click the Delay posting checkbox [3].
Select the Calendar icon and set the date and time using the calendar tool [1]. Or manually enter a date and time.
Click the Save button to post the announcement.