Amazon's Black Friday sale will begin a week before Thanksgiving on Nov. 21, the retail giant announced Wednesday.Why it matters: Amazon competitors Walmart, Target and Best Buy have already unveiled their holiday plans and started early sales.

Amazon’s official Black Friday deals start on November 21 and run through Cyber Monday (December 2). That said, not all sales will last for the duration of the event; some markdowns will only be available for a day—and in some cases, a few hours. So, grab the items that catch your eye right away.

At any rate, you may still want to peruse Amazon's early Black Friday TV deals to get a head start on your comparisons to other TV deals. TV deals are categorized by size and then listed from cheapest to most expensive within that size category, which will get longer as we refresh this list with new deals that pop up.