It has become apparent in the locksmiths industry that locksmiths are expected to sometimes work ridiculous hours.
It is quite the norm for a locksmith to be on call 24 hours a day 7 days a week for all kinds of lock outs, break ins and other residential emergencies. Other industries that require their employees to be on call 24 hours a day such as Paramedics, Fire Fighters, Police and Taxi's earn considerably more during these late night and early morning hours.
There are also positives of working as a late night locksmith as call out fees for emergency locksmith work can quickly reach $100's of dollar per hour. When looking for a locksmith its best to get a few quotes before making a decision, but in an emergency late night situation you may not have this opportunity. Always seek to have locksmith work completed by a reputable locksmith, preferably associated with your local locksmiths industry association.