Wikipedia launches.
Source: https://wikimediafoundation.org/news/2016/01/14/wikipedia-15-foundation-endowment/
ID: wikipedia-launch
Apple introduces MacBook Air.
Source: https://www.apple.com/newsroom/2008/01/15Apple-Introduces-MacBook-Air-The-Worlds-Thinnest-Notebook/
ID: macbook-air-announcement