Citi Bike is an important component of NYC's public transportation. Much research has been done to analyze user and trip characteristics in order to provide better services. An important question is whether there exist differences in rider behaviors between weekday and weekend. If biking is more likely to be for leisure on weekends and more of a commuting tool on weekdays, it may call for different bike allocation strategies. However, my research shows that there is no significant difference between the two regarding trip durations that took place in January 2015.