The date appears beneath the signature line. For those that have a social security number, you also have a social security card. These cards are good for life and do not expire.
They belong to the person who receive them for life. Social security numbers do not expire.
If the person legally returns to the United States, they would pick right back up using the same social. Yes they do have a expiration date. When your death is recorded the payments stop. If you or anyone cashes a payment after the death —that is a crime.
Otherwise the number is your ID until you expire. Within each area, the group number (middle two (2) digits) range from to 99. Select Register and complete the registration form and select your own password.
Make note of your the User I password and expiration date.
The visa expiration date is shown on the visa along with the visa issuance date. The time between visa issuance and expiration date is called your visa validity. The visa validity is the length of time you are permitted to travel to a port-of-entry in the United States.