To change the time on the Voice Mail, please do the following:

1) Press the VM key and enter the password
2) Press "4" to enter system administration
3) Press "5" to enter time options
4) Press "2" to change the time

To change the date on the Voice Mail, please do the following:

1) Press the VM key and enter the password
2) Press "4" to enter system administration
3) Press "6" to enter date options
4) Press "2" to change the date