How to Keep age for Passwords

This security setting determines the period of time (in days) that a password can be used before the system requires the user to change it. You can set passwords to expire after a number of days between 1 and 999, or you can specify that passwords never expire by setting the number of days to 0. If the maximum password age is between 1 and 999 days, the Minimum password age must be less than the maximum password age. If the maximum password age is set to 0, the minimum password age can be any value between 0 and 998 days.

Note: It is a security best practice to have passwords expire every 30 to 90 days, depending on your environment. This way, an attacker has a limited amount of time in which to crack a user's password and have access to your network resources.

How to Do:- Click Run, Enter gpedit.msc
This will open group policy, Under Computer configuration, Click windows settings, Security settings, Account policies, Password policy.
Now on the right side you can see Maximum Password Age, open it and change the value of 90 days..you can change this to your own and click ok.
Now open Minimum Password Age and change it to 30 and click ok.