advent

US /ˈæd.vent/
UK /ˈæd.vent/
"advent" picture
1.

the arrival of a notable person, thing, or event

:
The advent of personal computers revolutionized the workplace.
With the advent of spring, the flowers began to bloom.
2.

(in the Christian Church) the first season of the Christian church year, leading up to Christmas and commemorating the coming of Christ

:
Many churches light an Advent wreath during this season.
Children often open a chocolate calendar during Advent.