The specified certificate is not yet valid

Error : The specified certificate is not yet valid.

Background:

NetScaler 10.5

While configuring NetScaler Access gateway we need to install server certificate on NetScaler.

 After installation of certificate getting above mention error message.

Checked NetScaler Date and Time are Incorrect.

Resolution :

Connect NetScaler via putty

 Date command is used to check Date and Time on NetScaler.

To change the time on a NetScaler appliance, use the date command with the +val (value) parameter followed by the full date and time.

#date +val YYMMDDHHMM

where:
YY = Year
MM = Month
DD = Day
HH = Hour
MM = Minutes

Complete the following steps to manually set the time on a NetScaler appliance:

1. Switch to the shell prompt in the command line interface of the appliance:
   > shell
   root@ns#
   
   The following command is an example. In this scenario the NetScaler appliance must be set to 10:13 am on May 22, 2009. If the command is entered correctly, "val" will be displayed.
   # date +val 1507122218
   

   val

2. Enter the date command to verify the date and time. The current date and time is then displayed.
   # date

Refresh NetScaler Web page.