Bear with me here.
Let’s assume TFIOS happens in 2012. Which, I think it does.
Today is Bastille day. July 14th. In the last chapter of the book, Hazel and her parents go to the park, then the cemetery to see Augustus.
And then she gets a reply after 6pm from Lidewij.
Therefore, today, Hazel is eulogized by Augustus.
COMMENCE SOBBING, OKAY.