Cynical take: your contract normally says sometimes like "38 hours a week plus any reasonable additional time blah blah"
If there is an outage on Friday night or Saturday it doesn't affect feature work M-F. Company gets free labour.
Less cynial: continuous deployment agile scrummaster culture says you can deploy anytime so choosing a risky time is OK (risk of missing out on poisoning yourself with alcohol on a Friday night).
This is because (ignoring any reality) deployments should never fail or introduce regressions. Agile gods said so! Friday is a flex for agileness.
But not getting your tickets cleared M-F because of outage is war!