Hi,
The "business hour" feature has been refactored for HikaShop 3. It will comes with a plugin and will provide more features about hours and also week days.
Afterwards that plugin will be decline for HikaMarket in order to let the vendor set themselves their open hours.
But right now, with HikaShop 2.x ; there is no build-in advanced "business hours".
There are other threads in the forum which talk about how customize and improve the system ; mostly by overriding the "checkout / step" view.
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.