Subscription Plan Expired Date not working

I have a subscription plan that I would like to have end on a particular date. Currently the subscription length is set to 1 year. When I attempt to enter a date in the "Expired Date" field, it does not remain after I save it. It seems I can only get it to save for a fixed duration (such as the 1 year option).

EDIT: I think I found the answer. It appears these options only work with recurring subscriptions turned off. I hope there is a workaround to make this happen for recurring plans.  

Hello CHRISTOPHER

No, that's not possible with recurring subscription plan. For recurring subscription plan, the subscription end date will be calculated base on sign up date and subscription length of the plan (that's also the date which payment gateways process payment for the renewal)

So this kind of setting, as you figured out, will only work for one time subscription plan

Regards,

Tuan