amateur night

noun

an entertainment featuring amateur performers, often in competition for prizes.
Informal. an example of or situation marked by flagrant ineptitude: Critics say it's been amateur night at the embassy since the new ambassador took over.

Origin of amateur night

First recorded in 1930–35

Also called amateur hour.

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Its going to be amateur-night for me, to-morrow is, and no outsiders are urged to attend!
Believe You Me!
Nina Wilcox Putnam