Question: When did the apple tv 4k come out?

context: At an Apple Special Event on September 12, 2017, Apple announced the 5th generation Apple TV, named Apple TV 4K, which supports 2160p output, HDR10, Dolby Vision, and includes a faster Apple A10X Fusion processor supporting HEVC hardware decoding. Dolby Atmos support was added in tvOS 12. Externally it is similar to the 4th generation model, with the only differences being the addition of vents on the base, the removal of the USB-C port, and the addition of a white outline around the menu button on the included Siri Remote. Following the announcement of the new models, the 64 GB version of the 4th generation Apple TV was discontinued.
question: When did the Apple TV 4K announcement come out?
short_answers: September 12, 2017
context: No context provided
question: When was Apple  TV 4K released?
short_answers: September 22, 2017

Answer: Apple TV is a digital media player and microconsole developed and sold by Apple Inc. At an Apple Special Event on September 12, 2017, Apple announced the 5th generation Apple TV, named Apple TV 4K, which supports 2160p output, HDR10, Dolby Vision, and includes a faster Apple A10X Fusion processor supporting HEVC hardware decoding. It was released on September 22, 2017.