User blog comment:Martialmaniac/Little problem with August 30th/31st/@comment-31525652-20180422201848/@comment-5780397-20180423024408

We see Machi, Nobunaga, Franklin and Feitan arrive in Yorknew on the same day as Neon, which, as she says, is the day before the Underground Auction begins. The Underground Auction begins on September 1st, so the Spiders gathered on August 31st.