there was a time, when i was an undergrad (in NYC), when i had classes M-Th and wasn't working... thursdays, i'd stay up all night and when the sun came up, i'd go out and walk across 8th street to Balducci's (gourmet grocery store) and go shopping when they were just opening, then walk home into the sunrise, snack a bit, then go to sleep and wake up at about sunset friday evening...