Under the policy, eligible products purchased between November 14, 2018 and December 25, 2018 can be returned until January 8, 2019 in the United States, Canada, Australia, United Kingdom, and select other regions. You can return something ordered online or purchased in store, and Apple's policy states that the items can be sent back to Apple for free through the mail or dropped off at any Apple Store.
In countries like Japan and Spain, the policy is slightly different and extends from November 14, 2018 to January 6, 2019, with a return deadline of January 20, 2019 in these regions.
In all regions, items excluded from the return policy include Apple or iTunes gift cards. Otherwise, most products can be returned, including iPhone, iPad, Mac, Apple Watch, Apple TV, and more. The devices can be opened and used prior to being returned, but they must be undamaged and in their original packaging.
As with any holiday purchase, make sure you keep your receipts when buying on Apple.com or in an Apple retail store, to ensure that your purchase falls within the timeframe of the extended holiday return policy. If you bought something from Apple prior to today, it will fall under Apple's typical 14-day return policy.