Corrected entry: When Harold and Kumar are in the cell and are going to receive their 'cock meat sandwich', there is light shining into the cell coming from the cell window, clearly indicating it's daytime outside. However, when Harold and Kumar get outside in an attempt to escape, it is night time.
MasterOfAll
25th Aug 2009
Correction: Or, the light could be coming from one of the many lamp posts seen outside during their escape.
MasterOfAll