I had created a project plan using MS-Project 2010 (not server). I had set the task schedule mode to "Auto Scheduled" and entered the necessary tasks. Since it is a single person project I also added one person to the Resource of the file and assigned that resource to all the tasks and leveled the project. After the plan was put in and tasks were leveled I figured the calendar was not correctly set (in UAE the weekend is Friday and Saturday instead of Saturday and Sunday). So, I updated the default calendar (Standard) of the project by going to Project-Change Working Time-Work Weeks and changed them as needed. But after doing this, the tasks are still scheduled over Friday and Saturday even though I have marked them as nonworking days in the standard calendar. I tried the following for the tasks to refresh, but I was not successful: Updated all tasks to use the "Standard" calendar in the project Selected option so that tasks do not ignore resource calendars Added a constraint "As Soon As Possible" Executed "Level All" Any help on solving this issue would be much appreciated, thanks in advance.