Talk:The Blue Book of the Ocean/@comment-26339241-20150817202709/@comment-25298888-20150817220807

That refers to the date on the calandar. Today is the 17th, so it's an odd date. Therefore, book quests first appear at 2AM for an hour and reappear every 4 hours (red book is going right now). Tomorrow is an even date, so they'll start appearing at 1AM for an hour and reappear every 4 hours.