Funny enough, Persona 2: Innocent Sin takes place during the summer of 1999 and a big part of the plot is about the Grand Cross alignment on August 18. Basically the Y2K period was pretty intense for 'end of the world' prophecies if you were into that.
More importantly, I'm really enjoying this story so far! It's very cute and fun and I appreciate reading about a workplace that isn't terrible. Thank you for working on this!