debut

the act of beginning something new; "they looked forward to the debut of their new product line"

the presentation of a debutante in society

present for the first time to the public; "The band debuts a new song or two each month"

appear for the first time in public; "The new ballet that debuts next months at Covent Garden, is already sold out"

make one's debut; "This young soprano debuts next month at the Metropolitan Opera"