A password expiry time isn't fixed. It's calculated based on the time the password was last changed and the password expiration policy that applied to the account.
While this (https://www.webservertalk.com/check-password-expires-in-active-directory/#:~:text=You%20can%20also%20display%20all%20user%20password%20expiration,%2A%20-properties%20passwordlastset%2C%20passwordneverexpires%20%7Cft%20Name%2C%20passwordlastset%2C%20Passwordneverexpires) gives an example of how to calculate a password expiration time, it doesn't take into account any "fine grained" password expiration times.