The data must be changed on your computer.
The date can be changed by double clicking the date and time on the bottom right corner of the screen and follow the instructions.
If you have Windows 10, you have to go in start/settings/Date and time: uncheck the "automatic date and time setting" option and you will access to "Modify" button.
When you have installed the Phantom driver and Naza Assistant, check that everything is working, than you can go back to Date and time menu and restore the automatic date and time settings, if you wish.