There is no specific field in the logonid record that will indicate when a password will expire or need to be changed.
However, there are a few fields that , when worked together, will indicate an expiry date.
In the logonid record are three password date fields...
PSWD-TOD - regular password encryption (XDES)
PSWA1TOD - AES1 encryption
PSWA2TOD - AES2 encryption.
Also in the logonid is a field called MAXDAYS - this will define the maximum number of days before a password needs to be changed.
if that is not set, then the PSWDMAX field of the C(GSO) PSWD record will give a default life of a password.
if you add MAXDAYS or PSWDMAX to the PASSWORD date field, you can work out when a password will expire.