The focus of this proposed study is on weekend activities and associated travel behaviors. This study will preliminarily investigate time allocation behavior of individuals on weekends and construct a model of activity time allocation by activity-based approach. The proposed model will specifically take into account the state of the individual time allotment on weekdays and subjective evaluation of time use on weekdays. There are two features in this study: 1) This study tries to analysis the behavior of time allotment on weekends as previous studies focused only on the behavior on weekdays. 2) The study will develop an activity time allocation model for weekends which will consider the state of time allotment of individuals on weekdays along with subjective evaluation of time use during weekdays. Above two features will lead to a practical reference resource with theoretical underpinning for transportation planners who have to understand human behavior before planning and executing a transportation or infrastructure plan.