Editing 619 (section)

=== By topic ===
==== Arts and sciences ====
* The calculation of the [[Chinese calendar]] begins to use true motions of the sun and moon, modeled using two offset opposing [[parabola]]s.
* Construction begins on the earliest known [[tide mill]], [[Nendrum Monastery mill]] in the north of Ireland.<ref>{{cite book|last1=McErlean|first1=Thomas|last2=Crothers|first2=Norman|title=Harnessing the Tides: The Early Medieval Tide Mills at Nendrum Monastery, Strangford Lough|year=2007|publisher=The Stationery Office|location=Norwich|isbn=978-0-337-08877-3}}</ref>
* The Chinese begin using large [[orchestra]]s.

==== Religion ====
* [[December 23]] &ndash; [[Pope Boniface V]] succeeds [[Pope Adeodatus I|Adeodatus I]] as the 69th pope of Rome.
* [[Muhammad]]'s wife, [[Khadija bint Khuwaylid|Khadija]], dies after 24 years of marriage in the [[Year of Sorrow]]. 
* [[Kubrat]], ruler of the [[Bulgars]], is [[Baptism|baptised]] in Constantinople.
* [[Mellitus]] becomes [[Archbishop of Canterbury]].</onlyinclude>