http://www.pcworld.com/article/3163500/components/amd-confirms-its-ryzen-cpu-will-launch-in-early-march-followed-by-the-vega-gpu.htmlIf you want to know when the parts are launching, that's not an exact date, but it's more precise than AMD has said in the past. AMD is also promising a hard launch for Ryzen.
For those not up on the nomenclature, Ryzen is meant to be a high end CPU to take on Kaby Lake and Broadwell-E, Vega a high end GPU to take on the GTX 1080 and Titan X, and Raven Ridge is an APU primarily for laptops.