I am such a night owl! I can't fall asleep until at least 3 am! Are you also a night owl?
Night owl (person)
A night owl, evening person or simply owl, is a person who tends to stay up until late at night, or the early hours of the morning. Night owls who are involuntarily unable to fall asleep for several hours after a normal time may have delayed sleep phase syndrome. 
The opposite of a night owl is an early bird – a lark as opposed to an owl – which is someone who tends to begin sleeping at a time that is considered early and also wakes early.
1 am each night, despite the fact that bars and clubs in most areas of Boston are open until 2 am. Like nearly all subways worldwide, the MBTA's subway does not have parallel express and local tracks, so much rail maintenance is only done when the trains are not running. An MBTA spokesperson has said, "with a 109-year-old system you have to be out there every night" to do necessary maintenance. The MBTA did experiment with "Night Owl" substitute bus service from 2001 to 2005,