Hello,
The thing is that the coupon generator store the coupon end date into the serial extra data ( discount_end ).
So if you want to display the date, you just need to display that " serial.extradata.discount_end " information and use the "date" format to transform the timestamp into a formatted date.
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.