How could we know that we have succeed the lightning experience accreditation ?

How could we know that we have succeed the lightning experience accreditation ?

I am trying to upload a csv file in salesforce through apex code. In salesforce after uploading the csv file , date field is showing one day off.

For e.g. I am uploading 16-08-2015 in date field but in salesforce it shows 15-08-2015.

I know it is due to timezone problem but i want to resolve it. Can anyone have any idea to resolve this??

Thanks in advance!!!!