Just past the chapter 3. Basically it's kinda straight forward. Spoiler Midnight and the 40 minutes are correct. But the piglet tells half the truth, it is not that the hour comes first, it's the south(according to the white board in the greenhouse which is blocked by a invisible flower which can be seen by wearing the mask), then you'll have the answer... It's nothing to do with the tears, it's just for disturbing you.