end of month plus a year?

Is it possible to set a subscription to expire on the last day of the current month plus one or three years?

You want the duration to be 13 months? Please clarify as I don't understand what you're wanting, sorry.

Sorry for the lack of clarity! Our management wants all subscriptions to end on the last day of the month in which they sign up for a one or three year memberships. So if someone joins on October 17, 2013 for a one year subscription, it would end October 31, 2014. Once the initial expiration date is set, renewals would of course stay on that last day of the month with no further manipulation. The way we're doing it now (with AEC) is that she is manually changing the expiration date of all new members, and if/when we migrate it to CBSubs, it would be nice if it could be done automatically.

J!2.5.14, PHP 5.3.x CB 1.9, CBSubs 3.0

Thanks

I have similar question. Is this possible to be done automatically or does it need to be programmed. If so how?
Thanks

Unfortunately the only way to have this is to also manually modify the expiration dates. As is you can have a by calendar year subscription, but the end month and day are fixed and not dynamic based on when the user subscribed. The best approach maybe to just use a flat year or 3 year duration and it'll expire the day they subscribed, which may or may not be the end of the month, but it's at least clear to the user.