"His birthday is November 13th. How that translates to this place, I can't be sure. For me, when I left home it was the end of September. So three months later, for me it would be the beginning of January and hence my birthday." Senku smiled a little bit.

"For him, I think he left after his birthday. If I had to guess, it was December and he's been here, what, two months? So it would be February to him. It's very complicated when you think about it."