Timket or Timkat, the celebration of Epiphany in the Ethiopian Orthodox Church
, is a cause for great joy.
From the article:
During Ketara, the first day of celebration, there are processions with tabots, replicas of the Tablets of Law, onto which the Biblical Ten Commandments were inscribed. According to the legend the original tablets are kept in Axum, in northern Ethiopia.
(There is a photo slideshow at the link above.)