inauguration

noun

1. (countable, uncountable)The act of inaugurating, or inducting into office with solemnity; investiture by appropriate ceremonies.
2. (countable, uncountable)The formal beginning, initiation, or entry into service of any movement, enterprise, building, event, etc.

   “Near-synonym: dedication”

   “The inauguration of the new bar was a success, with plenty of discounts.”

   “Not a year goes by without the inauguration of new metros or light rail lines somewhere in the world.”