Date Format Changed When I am Importing Data from excel File

In excel file there is a time format i used that format " dd-mm-yy" but when i import data it showing " mm-dd-yy" format. So my month becomes day and day becomes month. So how can i solve this problem?
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Check the date format in System Settings. After importing the system must have considered the format from system settings

Thanks for your reply. But In system setting date format is also same as excel file date format.Capture