How do say "a plena luz do dia" in English?

In broad daylight = a plena luz do dia

Meaning: during the day, when it could have been seen and prevented. (Durante o dia, quando ele poderia ter sido visto e impedido.)

Example:  

Thieves had broken into the car in broad daylight and stolen the stereo. 

(Os ladrões arrombaram o carro em plena luz do dia e roubado o aparelho de som.)