So instead of waiting 11 hours before they start the update they wait 24. Either one would have been better instead of during the event.
And then they would be applying the update on a Friday and going home for the weekend. So if/when anything breaks they would have to be in for a weekend callout. This way they will have coverage in office for the 24 hours following release and can react/respond quicker should a crisis occur...
Back when I was working in a production environment we NEVER applied updates or patches before a weekend - nor during the week of a holiday - as getting in-house coverage for the critical time post update was nigh on impossible.