While posting a product, you will have the option to either select 'Launch Now' or 'Schedule Launch'.
If you'd like to schedule your launch to go live at a specific date or time you can select the 'Schedule Launch' to pick the day and time (in PST) within 7 days of your current day for the post to go live.
You will not be able to schedule a post further out than 7 days from the day you create the post.
After the post has been scheduled, you can continue to edit it. It will not be indexed on the site, and no users will be able to upvote it until the scheduled time.