Hornets are active throughout the day and much of the night. Since they're attracted to light, they're known to hit their bodies against windows, seeking the light indoors. ... Workers perform their jobs constantly during the day and night, but they rest in the hours in the early morning hours before sunrise.
Will a hornet attack at night?
In terms of activity, hornets are always active during day and night. ... Unfortunately, hornets are more aggressive than wasps and can attack you even if they're not provoked. They can even sting repeatedly. So at night, if you see an insect that looks like a wasp, you are better off staying away from it.
What time do hornets go to sleep?
Wasps return to their nest at dusk and remain their overnight. It is a good time to remove the nest, but this still has to be done very carefully. If disturbed, wasps will come out at night to get you.