The Work Calendar is important as the work calendar is the one that the system will use to pro-rate the pay when a person first joins the company or when the person resign. The number of days should be the same as the employment contract signed between the employer and employees.
To set the Work Calendar, follow these steps:
Step 1: Click on 
Step 2: Select 
Step 3: Click on 
Step 4: Click on the 
to edit the Normal Work Calendar
Step 5: (Optional) If you have more than one work calendar, click on the 
and change the date accordingly. Change the date accordingly. After you have made the changes, click on 
to save.
Note that you can have up to 10 alternatives.