To add to this question, is it the order date or charge posting date on the card? I know for amex offers/credits, its the charge posting date. Not sure about return/purchase protection.
I doubt that anyone here has that type of really specific insight into how AmEx Assurance Company employees calculate things, and even calling to ask can get you different replies from different agents. The only real way to find out would be to give it a try. Personally, I would err on the side of caution, and assume that even if I purchase something on December 27th, 2022, if the charge doesn't post until January 1st, 2023, it's going to count toward my 2023 calendar year purchases. On the other hand, it doesn't hurt to try, I guess, but if you're planning ahead, I wouldn't count on it being considered a 2022 purchase. Then again, if you were in a situation where you really needed to file a claim and this caused a later claim to be denied for being over the $1,000 annual limit per card account for return protection, you could always submit an appeal with a letter explaining that it clearly states on Amazon or eBay or Dell or whatever, that your date of purchase was "December 27, 2022", even if the charge didn't post until 2023. No idea how they'd respond to that, but at least you'd have formal documentation on your side. When filling out a claim, it asks when the purchase was made, so I always put the purchase date as listed on, for example, an Amazon or eBay "Order Details" page, as the claim documents ask for "purchase date", not "date of charge on your American Express bill".