“UPD” or “Último Primer día” (Last first day) is an argentinian
celebration that students make in reference to their last first day in high school.
The UPD begins on a night prior to the start of classes, with the condition of staying awake until entering school
the next day. The
celebration begins in a house where all or some members of the course meet, which then lasts overnight in parks near the school and ends at the door or in the courtyard of the institution they attend, until the time of school entry.
This celebration is widely criticized some acts of vandalism, the noise late at night, the use of flares, dirt generated on public roads and, especially, the consumption of alcohol