MediaWiki:Userrights-expiry-options
From Rackspace Email & Apps API
1 day:1 day,1 week:1 week,1 month:1 month,3 months:3 months,6 months:6 months,1 year:1 year
1 day:1 day,1 week:1 week,1 month:1 month,3 months:3 months,6 months:6 months,1 year:1 year