Promotions are run at the discretion of each online retailer. Sometimes, brands participate in “Cyber Weekend” deals that run between Friday and Monday immediately following Thanksgiving. Others run “Cyber Monday” promotions that are available on Monday only. Currently, many retailers run “Cyber Week” promotions from Black Friday through the following Friday. Some Cyber Week discounts may be “flash sales,” promotions that run for a limited time during the course of a larger promotion.