Set account expiration date from CSV

 create csv with below format:

Expire.csv

User,Expiration_date

User1,12-15-2015

User2,12-01-2015

User3,3-30-2015

User4,1-3-2016

use below script:

Import-Csv 'expire.csv' | ForEach-Object { Set-ADUser -Identity $_.User -AccountExpirationDate $([datetime]$_.Expiration_date) }