As the subject suggests, Judgment Hour (JH) should occur once a day irl.
This is essentially to provide more incentive and opportunities to pvp meaningfully.
Wiki page :
https://lifeisfeudal.gamepedia.com/judgment_hour
Thread with arguments :
http://lifeisfeudal.com/forum/na-buyan-server-petition-for-more-judgement-hours-t31764/