Sunday, Feb 5th from 10 am to 5 pm, in room 245 at the Lewis Library. Help work on Drupal 8 core, or learn how to "contribute to Drupal" by helping on drupal.org, support, documentation, debugging, testing, patches, etc.
The Lewis Library is located here: http://etcweb.princeton.edu/pumap/#630 You can park in the university lots on Ivy Lane (across from the football stadium).
To get to room 245, enter the Lewis Library building through the main doors off of Ivy Lane.
Go left to the stairs or elevator.
Go up to the second floor (1/2 a flight).
Go down the hallway and turn down the first hallway on the right.