People in 16 countries in 44 cities from Adelaide to Zürich cause "scenes of chaos and joy in public places" by removing their trousers in public, with 3,000 people doing it in New York alone. (BBC) (The Independent) (Ottawa Citizen)[permanent dead link]
Business and economy
The People's Republic of China conducts a land-based high-altitude anti-ballistic missile test. (SINA News) (Yahoo! News)
The Chinese Academy of Social Sciences reports that more than 24 million Chinese men of marrying age will be without spouses by the end of the decade, citing an uneven birth rate. (Global Times) (BBC)
Hundreds of prisoners are transferred from the Ignacio Allende prison in Veracruz, Mexico, in preparation for a controversial Mel Gibson film shoot. Protests from relatives of the prisoners are ignored. (BBC) (Hindustan Times) (CBC News)
Thousands of supporters of former Thai Prime Minister Thaksin Shinawatra gather outside the home of a royal adviser accused of involvement in the 2006 coup that ousted the Prime Minister. (Thai News Agency) (Reuters) (Al Jazeera)
Science and technology
Tombs discovered near Egypt's pyramids reinforce the theory they were built by free workers rather than slaves. (BBC News)