Customize Work Schedules

It would be nice if the work schedules could be customized. We have many instances where people will work for a half day but Wrike's work schedule only allows for a full day off. We have instances where these people still need to do work (let's say 1 hour work allotment of approvals for example) But because they are forced to put in a whole day it makes it very hard to get work done. 

Please, please add in hours available!