Hello,
HikaSubscription does not provide such kind of feature out of the box.
But the plugin system allows you to implement your custom needs via the available triggers.
When a subscritpion is created, a (custom) plugin can modify values, such as the end date :
www.hikashop.com/support/documentation/1...#subscription_plugin
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.