You are maintaining this sandbox for everyone else to play in, you should just do it when its most convenient for you and let the rest of us just deal with the outage.

I'm in the U.S. Eastern time zone, so like 8 or 9 am your time would be the middle of the night for me, which would be ideal, but honestly 10 minutes of downtime in the afternoon (this update will be 4 pm my time) isn't going to hurt. you do the work running the server, you should do updates when it's convenient for you.

I am from the Netherlands, so I am in the same time zone. I think the time is fine because (at least on weekdays) most people in that timezone might be preparing for the night anyway. For people living in different time zones this obviously will be different, but I have no idea whether we are de facto a (mostly) EU-based server.