Not OP, but a lot of American companies do layoffs on a Friday in an attempt to have fewer headlines on a weekend (news outlets aren’t fully staffed then, people are distracted, etc.)

https://www.kornferry.com/insights/articles/bad-news-deliver...

There are several, one is that you can time it with payroll, so your last day is the end of the current payroll period, just makes it neat for accounting purposes.

Another is that if the company doesn't want the media to pick up the "bad news", Friday is the best time to do it because it'll get lost over the weekend when it's reported on.

And finally, there's less worry about retaliation from disgruntled employees if they have the weekend to calm down over being let go.

I think he/she is saying that announcing bad news on a Friday usually helps because it mitigates the amount of negative coverage it would receive from the media. Announcing on a Monday then seems unusual from a PR perspective.