5 days darkness to wrap up flowering?

What is the maximum amount of time I should leave my plant in the darkness before harvesting? I see 2 days all the time as optimal but would leaving it in darkness for up to 5 days be horrible?

this is what I'm working with.........
View attachment 1334586

It's 72 hrs of dark before chop.

first off it looks like you have another 3 weeks tops to your flowing. also i wouldn't got more than 48 hrs for darkness. I only do 24 hrs in my grows and really like the results.