Kalends of January
. AD 806.
Connmach son of Dub dá Leithe, abbot of Ard Macha, died suddenly.
The slaying of Artgal son of Cathasach, king of Uí Chruinn of Airthir.
The killing of Conall son of Tadc, by Conall son of Aedacán in Cenn Tíre.
Building of the new monastery of Colum Cille at Cenannas.
Elarius, anchorite and scribe of Loch Cré, fell asleep.
The moon was turned to the colour of blood.
Murchad son of Flann, king of Uí Fhidgente, died.
The heathens burned Inis Muiredaig and invade Ros Comáin.
A battle between the community of Corcach and the community of Cluain Ferta Brénainn, among whom resulted a slaughter of a countless number of ordinary ecclesiastics and of eminent men of the community of Corcach.