Notice that 1 January 2014 is the new year day and a national holiday. People generated more traffic during the daytime. However, around 10% less traffic is generated at the night than usual (from 11:30 p.m. December 31, 2013 to 0:30 a.m. January 1, 2014), which can be explained by the fact that people were having the celebration during the time frame.