How to take Sat. and Sun. as workdays in workload view?

I’m using to manage my personal schedules so I don’t care weekends. As shown below, I’ve created a task whose duration is April 15 - April 17 and lasts 10 hours. But in this workload view obviously it moved the portion on April 15 to 16 (which are weekend days) all to April 17, which is not what I want. How to allow assigning task workload on weekend days?