Koiak

Koiak /ˈkʰɔjæk/ (Coptic: Ⲕⲟⲓⲁⲕ Koiak /ˈkɔjak/ or Ⲕⲓⲁϩⲕ Kiahk /ˈkijaxk/), is the fourth month of the Coptic calendar. It lies between December 10 and January 8 of the Gregorian calendar. The month of Koiak is also the fourth month of the Season of 'Akhet' (Inundation) in Ancient Egypt, when the Nile floods historically covered the land of Egypt; they have not done so since the construction of the High Dam at Aswan.