The largest launch day is September 5, when the Xbox One comes to 16 new countries. Argentina doesn't have an official release date yet, but Microsoft says it will share launch plans in that country shortly. See the release schedule below.
The Xbox One's launch in China marks a milestone in the country, since in January it lifted a 14-year ban on foreign console sales.
Xbox One September launch dates (via Xbox Wire):
9/2: Chile and Colombia
9/5: Belgium, Czech Republic, Denmark, Finland, Greece, Hungary, Netherlands, Norway, Poland, Portugal, Saudi Arabia, Slovakia, Sweden, Switzerland, Turkey, United Arab Emirates
9/23: Hong Kong, India, Korea, Singapore, South Africa, Taiwan
For gamers in Argentina, we'll have more to share on our launch plans shortly.