Do you have reputable source that says more women are assaulted at night than men? You should be careful where you get your information because, for example, many people are still promoting the lie that most victims of domestic violence are women even though there has been readily available evidence for decades that show men are victims of domestic violence at pretty much the same rate as women. 
According to Wikipedia men in Canada are far more likely than women to be victims of assault, homicide, robbery and various other crimes. For example men are twice as likely to be victims of aggravated assault (the most extreme category) and 3.5 times as likely to be victims of homicide or attempted homicide.