Sage advise for every developer and the fervent wish of every system admin. Goodnight sir.
As support, I would ask them "Please don't do that. You don't watch to make sure it works okay"
They would respond 'It's okay, because we'll be back online at 8am'.
"Yes, but our primary customers are farmers, who check our SaaS at 6am to plan their day. It's the point of our software."
'It's okay, because we'll be back online at 8am'
"I don't think you understand how this works..."
When is the best time to push new changes to production based on probability they will fall over, usage patterns and day of the week.
I'm relatively lucky as the stuff I do is mostly for businesses so the (obvious to me) push point is 8am Saturday morning, that gives me two days to sort out any problems and there is always some low level usage.