To change or adjust the system date and time using PowerShell, use following steps:
Step 1: Login to your Windows desktop or server with a user that has administrative privileges.
Step 2: Open PowerShell, type the following command and then press enter from your keyboard:
set-date -date "06/06/2014 18:53"
Make sure to change your date and time accordingly.
As a side note, the date format is as follows:
“mm/dd/yyyy”