Apple has posted a webpage for the U.S, Canada, Australia, United Kingdom, and other countries that offers a list of “order by” deadlines for products like the iPhone, iPad, Mac, Apple Watch, Apple TV, HomePod, and AirPods to arrive by December 24 (Christmas!).
At the webpage, you can see the latest dates to order your holiday gifts with free shipping. You can find specific delivery dates based on your selections and location in checkout. Apple says that in many cities, you can get in-stock items by 2-hour delivery or Apple Pickup.