noun
advent
AD-vent/ˈædvent/
The arrival or beginning of something important.
The electric lamp represents the advent of a new lighting technology.

Etymology
The pieces express “coming to,” hence an arrival. The religious use for Christ’s coming broadened into the arrival or beginning of anything important.
In context
Well, first because it saw the advent of the greatest invention in human history: Television.
More examples
- The advent of spring brings color back to the garden.
- Her career began before the advent of digital photography.
- The museum traces the advent of passenger air travel.
Forms
advent · advents
Similar words
- arrival
- More general; can concern an ordinary person or delivery.
- onset
- Often marks the start of something unwelcome or gradual.