Testers' Day
Testers’ Day is an unofficial professional celebration held annually on 9 September to recognise software testers and quality assurance specialists. The date commemorates the discovery of the first documented computer bug in 1947, when a moth was found trapped in the Harvard Mark II Aiken Relay Calculator. This incident popularised the term ‘bug’ for computer errors. The original moth is preserved in the National Museum of American History. In Australia, the day is marked by professional communities through conferences, courses, and competitions.
