a question (canon timeline)

[scribblestorm.livejournal.com]

Hi all! I have a question whose answer has been eluding me despite my efforts prowling Google, so I was hoping someone on here could point me in the right direction. It's for a fic I'm working on: that is, does anyone know when (around what year, etc.) the "pact" between Charles, V.V., Marianne and C.C. took place?

Anyway, I haven't been in this fandom all that long, so my apologies if this question has been resolved before. But, anyone who can answer it for me will have my undying gratitude!

Thanks for your time!