The invasion of Europe was operationally called Operation Overlord. (D-Day is the beginning day of all battles)
beginning of the leaves called embryo
Sunrise is generally considered the beginning of the day.
Rivers run from the source, or head, to the mouth of the river where it empties into a larger body of water, be it another larger river, or an ocean, or a sea.
The beginning of menstruation is called
The Beginning of the Constitution is called the Preamble.
The source or beginning of a river is called the 'headwater'. The beginning of a river is known as the source.
It was first called Macy's Christmas Parade because it signified the beginning of the Christmas shopping season.
It is called the 'Office of Lauds'. Its title comes from giving praise (laud) to God at the beginning of a new day.
The beginning of menstruation is menarche.
The beginning of day 6.
The word for "beginning" in Latin is principium, so "I am the beginning" is Principium sum.