Price changes are different than other metadata updates because they affect your publisher compensation and distribution orders.
You can now submit updates to a book's list price, discount and/or returns option, through your Lightning Source account no later than 11:59 PM US Central Time each Thursday, to have it applied in the Lightning Source system the next day, Friday at 12:01 AM US Central Time. The updates are then sent out to all of Ingram’s global distribution network.
To help with converting this cut off time to your local time zone you can find a time zone conversion tool here.
NOTE: Due to Daylight Savings time changes happening at different times throughout the world, please always check the time for Nashville, TN, to ensure you don’t miss the cut-off time of 11:59 PM US Central Time each Thursday.