Date format can be changed by clicking on 'Settings' on the top right of the screen and then choosing the format in the drop down list for 'Date Format'. This change is a 'Per User' change and is applicable only for the user who is logged in.

To make a change that will affect all new users created in the system, set the date format under :
Administration –> Users/Departments –> Preferences –> Date Format

The date formats available in Web Timesheet are :
 1) Month DD, YY
 2) Month DD, YYYY
 3) DD Month YY
 4) DD Month YYYY
 5) YY Month DD
 6) YYYY Month DD
 7) MM/DD/YY
 8) MM/DD/YYYY
 9) DD/MM/YY
10)DD/MM/YYYY
11)YY/MM/DD
12)YYYY/MM/DD
13)YY/DD/MM
14)YYYY/DD/MM
15)Mon DD, YY
16)Mon DD, YYYY
17)MM.DD.YY
18)MM.DD.YYYY
19)DD.MM.YY
20)DD.MM.YYYY