Special sale prices and/or offers are available only during the dates specified for that sale.
Sale prices are not available retroactively for products purchased before the starting date of the sale. Nor are they available for products purchased after the closing date of the sale. If a particular product goes on sale in a given month and you purchased the same product for the retail price in advance of that product going on sale, you are not entitled to a credit for the sale price. Also, if you purchase the product after the sale has ended, you are not entitled to receiving a credit to match the sale price.
To purchase a particular product on sale or through a special offer, you must purchase within the specified time that sale is taking place. Not before or after.