To change the working times in your calendar, please go to the menu Project menu – Change Working Time. In the Work Weeks tab, click on the Details button and for each working day, set the working hours. For the specific working times to be applied to your project, don’t forget to go to menu File – Options – Schedule tab and change the “Default start time” and “Default end time” values, as well as “Hours per day” and “Hours per week” values to match the set working times.