This tutorial explains how to schedule a price change for a product at a future date.
Navigate to the Store page and open the Products tab
Click the product you want to edit from the Products table
In the Product popup window, scroll down to the Variations table
Click the schedule icon in the Actions column
In the Scheduled Actions popup window, add a row to the table and enter the required information
Click the Save button
Note: Price changes will automatically update within 5-minutes of the time you set. If you set the time at the top of the hour, or at 5-minute intervals, it will update at exactly the time you set. Otherwise, it will update at the nearest 5-minute interval.