International days, weeks, years and decades

More information may be found here: 

http://www.un.org/en/events/observances/days.shtml

http://www.unesco.org/new/en/unesco/events/prizes-and-celebrations/celebrations/international-days/

http://www.unesco.org/new/en/unesco/events/prizes-and-celebrations/celebrations/international-weeks/

http://www.unesco.org/new/en/unesco/events/prizes-and-celebrations/celebrations/international-years/

http://www.unesco.org/new/en/unesco/events/prizes-and-celebrations/celebrations/international-decade...