Going to Project management and accounting> Project resources > resource availability> Yes. You can see all weeks start on Sunday and end on Saturday and this cannot be edited. The start of the week value is currently being hard coded in AVWeekProcessor class and hard coded Sunday as the start date of the week. In order to address this issue, we should expose a parameter in ProjParameter to capture resource scheduling week start date and default it to Sunday. If user will change this date to some other date, it needs to pop up warning message that ResRollup will needs to be run to recalculate the denormalized  ResRollup table.