Prevent backdate transation.

Question

Hi,

 

I am developing desktop application which is based on offline database(say sqlite). where capture information from user and it will be store in table with currentdatetime stamp.

 

My offline data will later be updated to server using api based on internet connection available,mannually or through daily schedular .

 

Main chellange i am having that how i can prevent user to enter backdate data which will store in local DB. Let say internet connection on pc is not constant may be down for many day. Also user who will use application will be having rights in his pc to change his date.

 

 

Please help me out how i can prevent user to enter past date.