[Koha] National holidays and other free days - how are they handled?

[Tomasz Holdowanski]

Hi all,

How Koha handles free days, especially national holidays in the middle 
of a week? Is there a list where I can write down all dates when my 
library is closed, so the system will not allow to set return date to 
any day from the list, but instead set it to the first "open" day after 
the "closed" one? I guess I could change the return date manually, but 
it`s rather bad idea when there are up to 300 patrons  and up to 1500 
transactions per day... Any suggestions?

Regards,
Tomasz.