“30. Killing season as it's known in the UK or the July effect as it's known in the U.S. is used to describe the time around July and August when newly qualified doctors first begin their residencies.” FactsDoctorsFactResidencyFunny But SadKilling Season Book:Interesting, Fun and Crazy Facts of America - The Knowledge Encyclopedia To Win Trivia Source: Interesting, Fun and Crazy Facts of America - The Knowledge Encyclopedia To Win Trivia