Ebook Promotions FAQ Overview Exact start and end times of ebook promotions are determined by the individual retailer’s guidelines. See below for more details. Booksellers Amazon (KINDLE)—Price will change on one or multiple Amazon stores at midnight of the promotion date in the local time zone of each store. Offer not available in India. Apple (iBooks)—Price will be changed from midnight on the start date to midnight on the end date. The time zone is based on each store’s local time zone, but for the US it’s EST. Barnes & Noble (NOOK)—US only; Price will be changed from midnight EST on the start date to 11:59 p.m. EST on the end date. Kobo—Price change from midnight on the start date to midnight on the end date in the time zone indicated (EST). Google—This promotion is not available on Google.