What did democracy really mean in Athens? – Melissa Schwartzberg https://teded.herokuapp.com/lessons/what-did-democracy-really-mean-in-athens-melissa-schwartzberg
International Day of the Victims of Enforced Disappearances https://glade.org/international-day-of-the-victims-of-enforced-disappearances/
International Day for the Remembrance of the Slave Trade and its Abolition http://www.unesco.org/new/en/unesco/events/prizes-and-celebrations/celebrations/international-days/slave-trade-and-its-abolition
