How to change time in CM 5.1

Login to Webpage using CM IP Address 

1) https://CM IP address
2) Go to Server maintenance mode
3) Under Server there will be option Server Date/Time
4) Put time time and date in below format
  MM/DD/YYYY
  HH:MM (use 24 hrs format)
  Select your time zone
5) Click on submit

Note:- if your phone are not update time from CM then use below process.

1) Login to CM
2) Command
   change system-perameters features
    system update time on station displays = Y

Then reboot your IP phone to get time and date information from Server.